1. Cut the head of the fish into two sides from the middle and lay it on the plate with pickled mustard and shredded ginger
2. Boil a pot of water and add the fish head after boiling;
3. Steam over high heat for 8 minutes. Do not open the cover immediately after turning off the fire. Steam for 3 minutes more with low heat. Take out and pour out the juice of steamed fish;
4. Sprinkle the scallion on the top, boil the hot oil and soy sauce with low heat, and pour it on the fish head while it is hot;