2. Boil a small pot of water, wash the bean sprouts, scald them with boiling water, take them out and put them in a large basin, and sprinkle a little salt according to personal taste.
3. Add three times as much oil as usual to a clean wok. When the oil is hot, add three tablespoons watercress (or chopped pepper) and stir-fry until fragrant. Add ginger, garlic, onion, pepper, Chili powder and dried red pepper, stir-fry over low heat. Add fish head, fish tail and fish steak, turn to high heat, stir well, add cooking wine, soy sauce, pepper and sugar, stir fry for a while, add appropriate amount of hot water, and season with salt and monosodium glutamate. When the water boils, keep the fire, put the fish slices in one by one, spread them out with chopsticks, and turn off the fire after 3~5 minutes. Pour the cooked fish and all the soup into the cauldron just filled with bean sprouts;
4. Take a clean pot and pour half a catty of oil (the specific amount of oil depends on the size of the prepared container, so when you pour it into the big pot, all the fish and bean sprouts will be submerged, which can be visually observed). Turn off the fire when the oil is hot and let it dry first. Then add a lot of pepper and dried pepper, and stir-fry slowly with low fire to give the fragrance of pepper and pepper. Be careful that the fire is not too big to avoid explosion;
5. When the color of pepper changes quickly, turn off the fire immediately and pour the oil and pepper in the pot into the big pot of fish.