Soybean curd or tofu refers to the product prepared by curdling soy milk. Soy curd is made from dried soybeans that are soaked for 12 hours to rehydrate them. They are then ground with water into a slurry. The slurry is cooked and then separated by centrifugal force into milk and pulp. This pulp, called okara, is used as animal feed in the US, but eaten on its own in Asia.