Put egg in a bowl, add ⅓ cup water, 3 tablespoons flour, ½ teaspoon salt. Mix evenly (this is the flour batter). Then mix the chopped green onions, ham, black mushrooms, and shrimp in another bowl.
Place two bean curd sheets on the chopping board, rub with 1 tablespoon flour batter, and sprinkle 1 tablespoon of the chopped ingredients evenly on the sheet. Place