Rinse beancurd sheets and preserved sichuan vegetables. Finely chopped or minced with blender. Add the seasonings to form the stuffing.
Brush the beancurd skin with frying batter. Then overlap with the seaweed. Spread on top an even layer of the stuffing. Fold up both ends and brush on the frying batter again. Roll up the sheet, seal with frying batter and steam for 15 minutes. Leave to cool.
Slice the steamed fish roll. Panfry until golden on both sides. Bring the sauce to the boil, pour over the fish roll and serve immediately.