In a 6-qt. electric pressure cooker, combine roast, 1/2 cup water, soy sauce and garlic. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 1 hour. When finished cooking, quick-release pressure. Add onion and peppers. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 2 minutes. When finished cooking, quick-release pressure. Press cancel. Remove beef to a cutting board., Select saute setting and adjust for high heat; bring liquid to a boil. In a small bowl, mix cornstarch, sugar, ginger and remaining water until smooth; gradually stir into vegetable mixture. Cook and stir until sauce is thickened, 1-2 minutes., Cut beef into slices. Stir gently into sauce; heat through. Serve with rice. Freeze option: Freeze cooled beef mixture in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally and adding a little water if necessary.