For the wrapper: • sweet potato starch (about 600 grams, for meatball wrappers) • tapioca starch (about 200 grams) • water (about 1100 grams) • green tea powder • mashed purple sweet potato (about 500 grams) • For marinating the meat: • pork, cut into chunks • Rice wine, • Soy sauce, • Ground black pepper, • Five-spice powder, to taste •