Heat 2 tablespoons of the oil in a skillet over a high flame and add the cabbage, beansprouts and onion. Stir well and saute for 3 minutes over a high heat. Add the noodles, soy sauce and sauce and stir well. Let this mixture cool.
Put some of the cooled stuffing in the center of each wonton wrapper and fold it over to make a semi-circle. Press the edges together and seal them with your fingers (moisten them with water first). Arrange the wontons in a greased steamer and give them about 10 minutes. Take the steamer off the heat and carefully remove the wontons.
Heat the remaining oil in a skillet over a high flame and saute the garlic, green onions and chilies for a minute or two. Pour this hot mixture over the wontons or serve it on the side as a sauce.