2. Add oil to the pot and heat it to 50% to 60% heat. At this time, pour half of the onion, ginger and garlic into the pot and stir-fry until fragrant. Then pour the marinated eel, add a proper amount of cooking wine and stir well. Then pour the prepared sauce into the pot and stir fry quickly, so that each piece of fish is covered with sauce. Then add sugar, pepper and appropriate amount of water to stew. When stewing, everyone should pay more attention to observation, and start collecting juice when it is not ripe. Put it away, season it with salt, put it on a plate, sprinkle with onion, ginger and garlic, and then pour hot oil, and the eel will be ready.