ready-to-use shu mai skin (round shape), minced pork (or chicken), shrimp, chopped, ear mushrooms, soak in hot water until soft and fluffy, finely chopped, garlic cloves, finely chopped, scallions, cut the white part only, finely chopped, grated ginger, sesame oil, soy sauce, salt or according to taste, ground pepper or to taste, cornstarch