Kidney has a strong and special smell, which many people think is delicious, and the meat of calf kidney is usually the most tender. French cooking method is to add Madeira wine to make fried kidney; Belgians add juniper and juniper to cook; In Britain, the kidney is the basic raw material of steak, kidney pie and blood sausage. The smell of sheep kidney is stronger than that of cattle kidney. You must remove the skin before cooking, and then you can slice it, bake it or fry it, but these two kinds are usually used for frying.