Tempeh is a traditional Indonesian food made from soybeans that have been fermented, or broken down by microorganisms.Following fermentation, the soybeans are pressed into a compact cake that is commonly consumed as a vegetarian source of protein.In addition to soybeans, tempeh may also be made from other bean varieties, wheat or a mixture of soybeans and wheat (1Trusted Source).Tempeh has a dry and firm but chewy texture and a slightly nutty taste. It can be steamed, sautéed or baked and is often marinated to add more flavor.Much like other meatless sources of protein, such as tofu and seitan, tempeh is a popular choice among vegans and vegetarians because it's packed with nutrients.