It depends on the ingredients: radish and eggs can be boiled for 8 hours, and Guandong cooking is a kind of cuisine that originated in kanto region. Usually the materials are eggs, radishes, potatoes, kelp, konjac, fish balls, bamboo wheels and so on. These materials are put in separate iron griddles, and the broth made of kelp and mullet flowers is simmered with low fire, with different tastes. Guandong Cooking originated from "Dengaku Miso". Tofu or naan is cooked with water, and then seasoned with miso before eating. In general, it takes about 30 minutes to cook in Guandong.