Simmered Freeze-Dried Tofu

Koya-dofu, freeze-dried tofu, comes in flat, creamy white squares, each weighing virtually nothing. When it is soaked in warm water, the tofu quickly absorbs a large amount of liquid and takes on a slightly spongy character. It has a distinctive, intense soybean fragrance but almost no flavor. It absorbs flavor from the condiments with which it is cooked. When you are preparing a vegetarian sushi, this sweet simmered tofu offers everything—meaty texture, nutrients, and it has now dev