Tom yum or tom yam is a type of hot and sour Thai soup, usually cooked with shrimp. Tom yum has its origin in Thailand. In recent years, tom yum has been popularised around the world. The words "tom yam" are derived from two Thai words. The essential ingredients of Tom yum are herbs such as lemongrass, galangal, and kaffir lime leaves. Other ingredients are also important especially Thai chilies, mushroom, coriander leaf (cilantro), tomatoes, sweet white onions, lime juice, sugar, and fish sauce.
