Whether yam can be cooked with pig's trotters and soybeans will not conflict, because the three ingredients can be cooked together and have complementary nutrition. However, due to the different ripening speed, it needs to be cooked in batches, and some of them need to be treated. For example, soybeans should be soaked before cooking, and yam is easy to cook and will break after cooking. It is best to fry or fry first to form a protective layer on the surface, so that it is not easy to break.