Soy protein – your essential guide to soy and tofu
Are you a fan of soy protein? With so many variations, soy can be a delicious extra in many recipes or even the main focus for a nutrient-packed healthy meal. Today, I’m writing about soy and sharing one of my favorite tofu recipes because soybeans and soy foods provide high quality protein but are often overlooked in the grocery store.
What is soy?
Soybeans – actually, beans in general – are not much of a dietary staple in the western world. But traditional soy foods – like tofu, miso and tempeh – have formed the basis of the diet in East Asia for centuries, where they’re valued not only for their versatility, but also for the healthy nutrition they offer.
Soy is nutrient-packed
While all beans provide protein, soybeans top the list when it comes to protein quality. Proteins are made up of small building blocks called amino acids. And some amino acids are termed essential – which means that we have to get them from foods, because our bodies can’t make them. A protein that contains all the essential amino acids is termed ‘complete’ – and soy is one of the few complete proteins in the plant world.
Soybeans are also low in saturated fat and, like all plant foods, are naturally cholesterol-free. Soybeans also offer up calcium, magnesium, phosphorus, potassium and B-vitamins, along with omega-3 fats.
If you’re trying to work more plant protein into your diet, you might want to give soy a try. With so many soy products to choose from, it’s easier than ever. Here are some of the most popular forms of soy.
• Edamame are fresh green soybeans. You can often find these in your grocer’s freezer either in the pod, or already shelled. After briefly cooking in salted water, they can be eaten as a snack, or added to soups and salads.
• Tempeh is made from soybeans that are partially cooked, allowed to ferment and then formed into a firm block. Since tempeh is fermented, it’s a source of “good bacteria”, or probiotics. Tempeh has a meaty flavor and firm texture which holds its shape, so it’s great for salads and stir-fry dishes.
– Miso is a paste made from fermented soybeans (which means it also contains probiotics) and it’s used as base for soup, as well as an ingredient in sauces, salad dressings and marinades. There are different varieties, and the color can range from light yellow to very deep brown. In general, light miso is less salty and milder in flavor than dark miso.
– Soy milk is made from dried soybeans which are soaked in water until they’re rehydrated, then ground with water. The resulting milk is sold as a beverage or made into yogurt. Soy milk and soy yogurt each have about 7 grams of protein per 8 ounce (250ml) serving. You can use soy milk as a beverage on its own, or you can substitute it for regular milk in most recipes or in protein shakes.
• Soy nuts are roasted whole soybeans. They make a nice snack on their own, and they’re also good in salads, in trail mix and on cereal. Soy nuts (and soy nut butter, which is made from ground soy nuts) have a bit more protein and a bit less fat than peanuts (or peanut butter).
– Soy protein powders and meat substitutes are made from soybean flour that’s had most of the fat removed. The powders can be added to smoothies or stirred into oatmeal and the soy meat substitutes can be used in all sorts of recipes in place of meat or poultry.
• Tofu is essentially a cheese that’s made from soy milk. It ranges in texture from extra firm to extra soft and has a very mild flavor – which means it mixes well with anything from spicy sauces to naturally sweet fruits. The firmer type of tofu is good for grilling or stir-frying, while the softer, creamier style is good in smoothies or sweetened and topped with fruit as a dessert.
Your quick guide to tofu
There are so many types of tofu that it can seem confusing. And I’m afraid many westerners dismiss tofu but it can taste great and with so many benefits it’s worth finding a few favorite types of tofu.
Silken Tofu has the most moisture of all tofus. It has a soft, very smooth, custard-like texture and tends to fall apart easily. It also comes in different degrees of firmness, so don’t assume that all silken tofu is soft. Silken tofu is the best tofu for whipping up in the blender or food processor. Once it’s blended, silken tofu adds a smooth texture and nice protein boost to shakes, soups and sauce. Silken tofu can be turned into a healthy dessert when it’s blended with fruit, a dab of honey and a dash of cinnamon. Or, you can blend it with garlic and herbs and use as a tasty dip for raw veggies.
Soft or Medium Tofu holds its shape a bit better than silken tofu, and it’s often mashed with a fork into a soft crumbly texture that makes a nice meat substitute in foods like pasta sauce. It’s also often used to make an ‘eggless’ egg salad by mashing with a bit of mustard and lowfat mayonnaise, or with some avocado.
Firm or Extra Firm Tofu has the meatiest texture of any tofu, which means it holds up to stir-frying, roasting or grilling. To make it even chewier and more ‘meat like’, some people slice it up and freeze it (which will change the color, but not affect the taste) before using in recipes.
The best roasted tofu recipe
Still not sure about soy and tofu? Try my recipe for roasted tofu! It’s great right out of the oven, with some stir-fried veggies, but it’s good cold, too! I like to put my roasted tofu spears on top of a salad for lunch, or have a few pieces with some cucumber slices for a quick snack.
– 1 package firm tofu (typically, 14 ounces, 425g)
For the marinade
– 3 Tablespoons light soy sauce
– 3 Tablespoons rice vinegar
– 1 teaspoon sugar or honey
– 1 teaspoon sesame oil
– dash ground ginger
– dash garlic powder
– dash white pepper
Olive oil (to lightly grease the baking sheet)
– Whisk together the ingredients for the marinade in a shallow baking pan and set aside.
– Remove the tofu from the package and drain off all the water.
– Wrap the tofu block in a few paper towels or a regular clean kitchen towel, and gently press out any additional moisture.
– Cut the tofu into triangles or ‘spears’ and arrange in a single layer in the pan with the marinade, turning the pieces over to coat all sides.
– Cover with plastic wrap, and let marinate in the refrigerator for at least 30 minutes (I love this recipe because you can leave the tofu to marinate for up to 48 hours).
When you are ready to cook the tofu:
– Preheat the oven to 350 F / 180 C / Gas Mark 4
– Coat a large baking sheet with a bit of olive oil to prevent the tofu from sticking. (You can cover with pan spray instead, or line your baking sheet with parchment paper.)
– Arrange the tofu pieces in a single layer on the baking sheet and pour any remaining marinade over the tofu pieces.
– Roast in the oven for about 45 minutes, turning occasionally (and gently).
– The pieces should be firm, and have a nice brown glaze.
– If you aren’t going to eat these delicious tofu spears right away, you can store in the refrigerator. This roasted tofu is delicious hot or cold!
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