Spicy Orange Chicken Stir-Fry

Cut chicken into 1/2 inch cubes. Combine soy sauce, sherry, oyster sauce and orange zest. Mix with chicken and marinate 15 minutes at room temperature. Seed and stem peppers. Cut into 1/2 inch cubes. Cut zucchini lengthwise (don't peel) into 4 strips. Cut each strip crosswise into 1/2 inch pieces. Peel onion and cut into thin wedges. Cut each wedge in half. Combine veggies in bowl. To prepare sauce, combine orange juice, sherry, oyster sauce, sesame oil, chili sauce and cornstarch in small bowl. Set aside. Place wok or heavy frying pan over high heat. When wok becomes hot, add 2 tbsp. oil. When oil smokes, add chicken and stir 2 miutes. Remove to plate. Add remaining 1 tbsp. of oil along with garlic and gingerroot. Stir for 5 seconds, add veggies and stir 2 minutes. Add spicy orange sauce and chicken and stir until sauce thickens. Serve immediately.