Monday, April 29, 2013

Perfect Oven Omelettes

I’ve only recently started to like eggs. That may destroy my credibility in posting an omelette recipe, but hear me out. There are two huge challenges to making eggs great: texture and flavor. Everybody knows about the textural issues. Eggs can be rubber when you want velvet, watery when you want creamy, and astringent when you want melty.

The flavor issue is a little more subtle. When eggs are cooked for too long at higher heats, they release sulfurous compounds with a potent smell and flavor. These compounds are called thiols, and they come from protein breakdown in the white. Some people call this flavor “eggy,” much like the distinctive “fishy” flavor*. But I refuse to accept that “eggy” is an intrinsic property of eggs. “Eggy” isn’t a flavor I enjoy, and so I’ve been grateful to learn that you can make almost all egg preparations without developing this flavor.

The secret to perfect eggs is precise temperature control**. In fact, I would argue that the secret to cooking almost all proteins well is precise temperature control. This is why some of the more popular egg preparations among chefs are cooked in simmering water (poached), a bain-marie (French scrambled eggs), or sous vide (almost anything you can think of). Admittedly, fried eggs are not typically cooked this way, but their brief exposure to heat makes their “eggy” flavor less pronounced than a traditional hard boiled egg.

In this recipe, we control heat transfer by preheating a metal baking sheet in the oven. This allows excellent heat transfer to occur without expensive equipment. We adapted this recipe from Modernist Cuisine at Home. They use a small frying pan, extra egg yolks, heavy cream, gourmet fillings, and a lot of repetition. That’s great, but we wanted to see what would happen if we tried the same thing with a huge pan, milk, and classic omelette toppings. We think it turns out really well! Plus, what’s cooler than cooking a six-egg omelette all at once? It sure beats trying to toss two-or-three smaller omelettes on the stove.

*I like “fishy” flavor, and I really like “fish saucy” flavor. So don’t put those flavors in the same category as “eggy” by saying you have to have the “eggy” flavor to enjoy eggs. We’re all different though, so if you really love “eggy”, I highly recommend that you try using Indian black salt. It’s a sulfurous salt that smells just like a dozen overboiled eggs. Some say it’s an acquired taste. I think that it’s a direct assault on happiness. Incidentally, it’s an ingredient I am purposefully leaving out of a Chana Masala variant I’m working on right now.

**Nerdy note. This should actually be heat transfer control. In an oven, heat transfer is relatively slow, while in a water bath, it is much more rapid. Having precision temperature in an oven, therefore, is much less important than in a water bath. With that said, I still would love to have a combi-oven in my kitchen one day.  

Special Equipment
Nothing! (but a blender won’t hurt)

Full Ingredient List
6 eggs
30 g/2 Tbsp milk
2 g/0.25 tsp salt
Cooking spray
Shredded cheddar cheese (optional)
Crispy bacon (optional)
Green peppers (optional)
Green onions (optional)

Instructions
Step 1: Preheat the oven

Preheat your oven to 350 degrees F/180 degrees C. Place a baking sheet on the middle rack of the hot oven for at least 15 minutes.

Step 2: Make the omelette

6 eggs
30 g/2 Tbsp milk
2 g/0.25 tsp salt
Cooking spray

Grease a 9” by 13” casserole dish with the cooking spray. Blend together the eggs and milk (We like to use a blender, but a whisk works in a pinch.) Pour the eggs into the casserole dish. Place the casserole dish in the oven and immediately cover it with the baking sheet. Cook until the eggs are just set, 8-10 minutes.

Step 3: Top the omelette
Shredded cheddar cheese (optional)
Crispy bacon (optional)
Green peppers (optional)
Green onions (optional)

Immediately top the omelette. Start with ingredients that need to melt (such as cheese, and then add on the other ingredients. Serve hot.

Wednesday, April 24, 2013

Roasted Potato Soup

Winter is supposed to be over, but it seems to linger here in Pittsburgh. This potato soup is an easy way to fight against the chill. We use the pressure cooker to help develop the rich flavors of roasted potatoes in just a few minutes. It's true that the potatoes aren't really roasted, but it sure is nice to leave the oven off just in case the sun decides to come out!
 
Special Equipment
 
Full Ingredient List
 
600 g/about 3 medium potatoes, peeled
30 g/2 tbsp butter
3 g/baking soda
55 g/0.25 cups chicken stock (or water)
125 g/half an onion, diced
1 tsp vegetable oil
170 g/6 oz ham, cubed
450 g/2 cups milk
55 g/0.25 cups heavy cream or sour cream
Pepper to taste
Sharp cheddar cheese (Optional)
Frank’s Redhot (Optional)
 
Instructions:
Step 1: Caramelize the potatoes
 
600 g/about 3 medium potatoes, peeled
30 g/2 tbsp butter
3 g/baking soda
55 g/0.25 cups chicken stock (or water)
 
Slice the potatoes into 1 cm/0.5 inch thick half circles. Melt the butter in the pressure cooker. Toss the potatoes in the butter until coated. Add the stock and baking soda. Cover and turn up the heat until you reach 1 bar/15 psi (this is the standard setting on pressure cookers). Turn the heat to low and cook under pressure for 20 minutes. Release the pressure by running cold water over the top of the pressure cooker.
 
Step 2: Saute the onions and ham
 
125 g/half an onion, diced
1 tsp vegetable oil
170 g/6 oz ham, cubed
 
While the potatoes cook, saute the onions in oil over medium heat until clear. Add the ham and cook until light browning starts to appear. Remove from heat and stir into the potatoes. The potatoes will break apart slightly, leaving many large chunks.
 
Step 3: Finish the soup
 
450 g/2 cups milk
55 g/0.25 cups heavy cream or sour cream
Salt and pepper to taste
Sharp cheddar cheese (Optional)
Frank’s Redhot (Optional)
 
Stir in the milk and cream and warm over low heat. Add salt and pepper to taste. Top with shredded cheddar cheese and Frank’s Redhot (if desired). Serve immediately.

Monday, April 15, 2013

Perfect Nacho Cheese


I have a love-hate relationship with nachos. We ate them all the time as kids, and they are still one of my favorite snacks. My go-to version of nachos is really simple. I grate a little sharp cheddar cheese over a plate full of tortilla chips and then microwave on high for 25 seconds. The cheese and chips combine into a greasy, salty, snack that forms the wonderful foundation for a variety of toppings.

Concession-stand nachos, on the other hand, are not something I enjoy. The yellow goop doesn’t taste like cheese, and the spicy flavor is sharp and one-dimensional. Also, it’s usually served with bland, round tortilla chips. The texture of the sauce is good, but the flavor combination just isn’t right. At $7 a tray, I've never understood why anyone buys these.

In my opinion, great nachos are made by letting good cheese shine. Since great cheddar doesn’t melt into a smooth sauce, you have to add something to the cheese to keep the oil and water together. The classic recipes for cheese sauce call for a roux, which is a blend of equal parts flour and butter. This works well, but it also smothers the taste of the cheese. That's the reason your homemade mac n' cheese can't really complain when the blue box claims to be "the cheesiest."

Thankfully, there is an easy way to make a cheese sauce that will capture the delicious flavors of any cheese: just add a pinch of sodium citrate. Modernist Cuisine at Home gives two different recipes to make this work, and they have been nice enough to publish both of them on the web. The first version creates an amazing sauce, but it hardens rapidly when poured thin over chips. And don't even think about dipping this stuff--the slightest amount of cooling causes it to harden into a chip-crushing lump of cheese. This is perfect if you want to mold your own American cheese, but it is terrible for a cheese sauce. The second Modernist Cuisine at Home sauce is also excellent, but it tends to be a little too thin. They claim that this sauce is ideal for mac n' cheese, but it doesn't really stick to the noodles. I think that it's probably best thought of as a base for a cheese soup.

This adaptation improves upon the second Modernist Cuisine at Home recipe by thickening it with a touch of xanthan gum. You'll be using two ingredients that you may be unfamiliar with, but you'll end up with a perfect cheese sauce that you'll want to cover everything with. I love to throw in a little liquid smoke and hot sauce for a flavorful treat, and sometimes I mix it with a little thai sweet chili sauce to mix things up. It is excellent in any of these mixtures over chips, pretzels, or steamed vegetables, but my very favorite way to eat it is over a bowl of freshly cooked pasta. I hope Kraft has a great legal team, because this sauce really is "the cheesiest."

Special Equipment
Immersion blender (ideal) or countertop blender (both are optional)
Kitchen scale (it is too hard to determine the appropriate amounts of cheese, sodium citrate, and xanthan gum without one. But trust me, it's a great investment)

Full Ingredient List
300 grams milk
270 grams sharp cheddar cheese, grated
30 grams parmesan cheese, grated
0.6 grams xanthan gum

Instructions
Step 1: Melt the cheese into the milk

300 grams milk
11 grams sodium citrate
270 grams sharp cheddar cheese, grated
30 grams parmesan cheese, grated

Stir together the milk and sodium citrate. Over low heat, slowly wield in the cheese. Continue stirring until all the cheese has melted.

Step 2: Thicken the sauce

0.6 grams xanthan gum

Add the xanthan gum to the cheese mixture. Blend until fully incorporated and no lumps are present. Note: If you don't have a blender, just add a couple of drops of vegetable oil to the xanthan gum. The resulting oil and xanthan gum slurry will incorporate perfectly into the sauce without any lumps.

Monday, April 8, 2013

Modern Kitchen Staples

The modern kitchen requires us to think differently about the food we eat. Most of these ingredients are the same foods you have always used: fresh produce, dried beans, grains, fruits, meats, dairy, oils, sugars, salts, etc. However, some staples in the modern kitchen may be unfamiliar--and perhaps a little frightening to people who have not used them before. Some of these may be things you've seen only seen on food labels. Due to a generalized mistrust of the processed food industry, you might be a little worried about what these are, where they come from, and how they might affect your health. I respect that sentiment. As we go forward, I will do my best to explain where each ingredient comes from, what it can be used for, and the advantages of the modern version over more familiar cooking supplies. Today, we'll just talk about three different categories of ingredients: thickeners, gelling agents, and emulsifiers.
Thickeners
Thickeners give body to a sauce and slow down the flow of fluids. When you make a simple pan gravy, you take the drippings from the meat and then whisk in a little corn starch. After boiling, this produces a much thicker sauce. However, the starch molecules have a tendency to hold back flavor. A simple substitution of xanthan gum or Wondra accomplishes the same task with a lower quantity of thickener. This allows the flavor of the sauce to shine through without any starchy taste or texture.
Familiar: corn starch, flour
Unfamiliar: xanthan gum, Wondra  
Gelling Agents
Gelling agents include gelatin and pectin, the critical ingredients in Jello and fruit jam. These ingredients are fantastic, but each has limitations. For example, gelatin-based dishes melt into thin liquids at body temperature, while agar-based gels can form similar structures (and even thick liquid gels) at much higher temperatures. Agar is not animal-based and therefore suitable for vegetarians and vegans. Carageenan is an ingredient I have not yet used, but it is a commonly used in commercial chocolate milk to make a thick, pourable gel.
Familiar: gelatin, pectin
Unfamiliar: agar, carageenan
Emulsifiers
Oil and water don't typically mix, and emulsifiers allow these ingredients to come together into a smooth, stable mixture. The most common emulsifier is called leciithin, and it is formed from the cell membranes of many living organisms. Lecithin is found in abundance in egg yolks, which makes it the critical component of mayonnaise. Purified lecithin is usually made from soy beans, but it can be used in much smaller quantities than an egg yolk and has zero risk of curdling with heat. Sodium citrate is a salt of citric acid, and it raises the pH of sauces and binds calcium. In milk-based sauces, calcium binding causes milk proteins to better interact with both water and fat, allowing you to make unbelievably smooth cheese sauces. 
Familiar: egg yolk, roux (flour and butter)
Unfamiliar: sodium citrate, lecithin
Are you skeptical that you won't use any of these? Wait until you learn how to make the ultimate cheese sauce. You may just change your mind!

Thursday, April 4, 2013

Silky Smooth and Simple Hummus


I used to think that making hummus was a pain. Even after you boil chickpeas for an hour and a half, you still need to transfer them to a food processor or continuously push them down into a whirring blender. Then, of course, you need to clean out the food processor, which only adds to the mess. Now I simplify things by whipping out my immersion blender to make a velvety dip in the same pot I boiled the beans in. The process is fast and clean-up is easy.

The real trick to great hummus, though, is not how you mix it. The secret is pH control when cooking the chickpeas. If you add a little baking soda when you cook the beans, they almost melt into a smooth, creamy puree when blended. Without the baking soda, you are guaranteed to have a slightly gritty hummus (note that canned beans also give you the same mealy texture). I’m still trying to figure out exactly what’s going on with the baking soda, but Harold McGee suggests that the pH change helps to dissolve tough cellulose molecules in the cell wall. The baking soda also speeds cooking. And If you want to make your hummus in less than 30 minutes, toss it into a pressure cooker.

This recipe is very basic, but you can add anything you like to it. Try tossing in roasted red pepper, caramelized onions, or liquid smoke. I've heard that you can replace the tahini with peanut butter, but I haven't had the guts to try that yet. In any case, I don't see myself buying hummus from the grocery store anytime soon!

Special Equipment
Pressure cooker (optional)

Full ingredient List
200 g/1 cup dry chickpeas (also known as garbanzo beans, chana, or chole)
Water
4 g/0.5 tsp baking soda
30 g/2 Tbsp tahini
55 g/0.25 cups lemon juice (about 1 lemon)
2 g/0.25 tsp salt
1 clove garlic
Olive oil (optional)
Paprika (optional)
Dill (optional)

Instructions
Step 1. Prepare the chickpeas

200 g/1 cup dry chickpeas (Also known as garbanzo beans, chana, or chole)
Water

Soak the chickpeas in water so that they are covered by at least 5 cm/2 inches of water. Allow to soak at room temperature for at least 8 hours. Drain the water and rinse the chickpeas.

Step 2. Cook the chickpeas

Soaked chickpeas
Water
4 g/0.5 tsp baking soda

Add the chickpeas and water to the pressure cooker. Make sure the peas are covered by about 2.5 cm/1 inch of water. Stir in the baking soda. Cover and turn up the heat until you reach 1 bar/15 psi (this is the standard setting on pressure cookers). Turn the heat to low and cook under pressure for 20 minutes. Release the pressure by running cold water over the top of the pressure cooker. (If you do not have a pressure cooker, boil the beans for 90 minutes). Drain and reserve the cooking liquid for the next step. Keep the beans in the uncovered pressure cooker.

Step 3. Puree the hummus

Cooked chickpeas
30 g/2 Tbsp tahini
55 g/0.25 cups lemon juice (about 1 lemon)
2 g/0.25 tsp salt
1 clove garlic
Reserved cooking liquid

Combine the cooked chickpeas, tahini, lemon juice, salt, garlic, and 55g/0.25 cups cooking liquid (I like to do this in the same pot I cooked the beans in). Puree with the immersion blender. Thin to your desired consistency by adding up to 115 g/0.5 cups cooking liquid to the hummus.

Step 4. Garnish the hummus

Place the hummus on a plate or in a bowl. Drizzle olive oil over the top, and lightly sprinkle paprika and dill over the top if desired. Serve with hot crusty bread, sliced pitas, or fresh vegetables.

This recipe is adapted from a great article from The Paupered Chef.