Boil chow mein noodles according to package directions. Drain. Heat 2 tablespoons oil in wok or very large frying pan. Stir-fry noodles for 3 to 5 minutes, or until crisp and light brown. Remove from wok and set aside. Add remaining 2 tablespoons oil and garlic.
Add bean sprouts, bok choy, carrot, green pepper, celery, water chestnuts, bamboo shoots, mushrooms and onion to wok. Stir-fry for several minutes over high heat. Add shrimp, chicken and barbecued pork. Continue stir-frying several minutes. Add broth and cover with lid.
Cook with lid on for 3 to 4 minutes. Combine Cornstarch with cold water. Stir in oyster sauce, sugar, MSG, if used, and salt. Add sauce and noodles to wok. Continue cooking just until sauce thickens about 1 minute. Serve immediately.Makes 1 Source: