Also called bean curd, tofu is a processed extract of soy beans. It is an excellent source of protein and is available fresh or deep-fried. Fresh tofu comes in two forms : a soft, white variety also known as silken tofu, which is cut into cubes and used in Japanese dishes. Another type is a firmer variety which is cut into cubes, wedges or slices and deep-fried. Both are available in blocks sealed in plastic. Once opened, store in the fridge in water and change the water daily. Use within a few days.