Cook rice according to package directions. Meanwhile, in a small bowl, combine the cornstarch, garlic powder and ginger. Stir in orange juice until smooth. Stir in water and soy sauce; set aside. , In a large wok or skillet, stir-fry pork in oil until juices run clear; remove to a platter and keep warm. In the same skillet, stir-fry peas until tender. Return pork to skillet. Stir orange juice mixture; add to skillet. Cook and stir for 2 minutes or until thickened. Gently stir in oranges. Serve with rice.