1, wash the fish, use kitchen paper towels to absorb excess water on the surface (because you want to cut, so as little water as possible is best); pour a spoonful of cooking wine, shredded ginger, salt marinade for 10-15 minutes;
2, in a hot pan, pour more oil than usual frying, probably higher than the bottom of the pan 2-3mm. when the oil is hot, add the fish. Fry the fish until the skin on both sides is browned and hardened. Serve the fish on a plate when it is cooked.
3. Dice the tomatoes and use the oil left over from frying the fish to continue simmering the tomato sauce, during which time mix the sauce: vinegar + sugar, according to personal taste, because tomatoes are sweet and sour, you can only add a small amount of sugar.
4, simmering tomato sauce thick, into the fried fish with simmering 10-15 minutes.
5, start the pot, sprinkle green onion!