In a small bowl, combine the first six ingredients; set aside. In a large skillet or wok, stir-fry chicken in oil for 5-6 minutes or until chicken juices run clear. Add the vegetables; stir-fry for 3-4 minutes or until crisp-tender. Stir in pineapple and reserved soy sauce mixture; heat through. Serve with rice. Yield: 6 servings.