Please note the differences in the recipe ingredient amounts, and filling options when using these fillings:
Shrimp Filling: Stir together 8 ounces finely chopped fresh shrimp, 1/4 cup chopped water chestnuts, 1 egg yolk, 1 tablespoon finely chopped Chinese chives or chives, 1 tablespoon less-sodium soy sauce, 1 1/2 teaspoon minced fresh ginger, and 1 teaspoon toasted sesame oil in a bowl.
Mushroom-Tofu Filling: Cook 3/4 cup chopped shiitake or button mushrooms in a large skillet over medium heat until all liquid has evaporated and mushrooms are tender; cool. Transfer to a bowl and mix with 1/3 cup pressed and chopped extra-firm tofu, 1 egg yolk, 1 tablespoon Chinese chives or chives, 1 tablespoon less-sodium soy sauce, 1 1/2 teaspoons minced fresh ginger, 1 teaspoon toasted sesame oil, and 1/4 teaspoon Chinese 5-spice.