2. Take out the frozen fish pieces, put them in cold water, pour in a little vinegar, soak until the ice cubes melt, then cut the herring into small pieces, wash and drain.
3. Heat the oil pan until it smokes, add the fish pieces and fry slowly over medium heat.
4, fry until one side is golden, turn over and continue to fry until all golden.
5. Take out the fish pieces.
6, another oil pan, add the right amount of tomato sauce, a little cooking wine, a little more soy sauce (no salt), you can add some sugar, stir fry a few times, pour a small bowl of water to boil.
7. Add the fish pieces and cover the pot to cook. Boiling water can make the fried fish pieces less hard and more tasty.
8. Cook until the soup is thick, turn off the fire and take out the pot. Sprinkle with chopped green onion or cooked sesame seeds to decorate.