Marinade:
Sauce:
Combine marinade ingredients in a bowl. Add chicken and stir to coat. Let stand for 10 minutes. Combine sauce ingredients in a small bowl; stir until ingredients are mixed well. Place a stir-fry pan or wok over high heat until hot. Add oil and butter; stir until butter melts. Add garlic, onions and cook; stirring, until fragrant, about 3 minutes. Add chicken and stir-fry, until it is cooked through, about 5 minutes. Add sauce and bring to a boil while stirring, until sauce thickens slightly. Add the orange zest and stir well to evenly coat the chicken. Makes 4 servings.