It's the same what, fermented soya beans
It originated in today's Indonesia, and is especially popular on the island of Java, where it is a staple source of protein. Like tofu, tempeh is made from soybeans, but tempeh is a whole soybean product with different nutritional characteristics and textural qualities.[1] Tempeh's fermentation process and its retention of the whole bean give it a higher content of protein, dietary fiber, and vitamins. It has a firm texture and an earthy flavor which becomes more pronounced as the tempeh ages.[2][3] Because of its nutritional value, tempeh is used worldwide in vegetarian cuisine; some consider it to be a meat analogue.