Steamed Pork Wonton Dumplings

1 lb. ground pork
1 (5 oz) can water chestnuts, strained and finely chopped
1/2 cup scallions, finely minced
1 tablespoon minced garlic
1 tablespoon jarred minced ginger
1 tablespoon sesame oil
1 egg, beaten
1 pack oriental sesame dressing mix
2 tablespoon oyster sauce
1 (16 oz) pack wonton wrappers
savor or nappa cabbage
bamboo steamer

In a large bowl, mix pork, water chestnuts, scallions, garlic, ginger, sesame oil, egg, sesame dressing mix, and oyster sauce. Fill center of each wonton wrapper with 1 teaspoon of meat filling. Gather wrapper up and twist to secure sides. Brush the edges of the wontons with water to help seal. Arrange cabbage leaves on the bottom of a bamboo steamer. Place dumplings about 1 inch apart and steam until the filling is cooked through, about 20 minutes.