2. Put the oil into the wok and shake it so that the oil is all over the pan. When the oil is hot, fry the fish head in the pot until the whole fish head is cooked, and order a little cooking wine or shochu.
3. Put the fried fish head into the casserole and immerse the fish head in cold water. Put it on the gas stove and boil it. Skim off the foam. Continue to cook for about 20 minutes. Just boil it, don't put soy sauce, it will turn milky white.
4. When stewing fish head, wash tofu slices and sauerkraut.
5. The stewed fish soup is milky white. At this time, put the tofu and sauerkraut into the casserole and add some salt to continue the stew.
6. Cook for 15 minutes.