Cut off tops of green peppers; remove seeds and membrane. Mix turkey with rice, onion, Worcestershire sauce, garlic, and pepper. Mix half of tomato sauce with turkey mixture, then spoon mixture into peppers; cover.
Place in microwave and cook 18 to 22 minutes, giving dish quarter-turn every 5 minutes. Add water and remaining tomato sauce.
Sprinkle cheese over each pepper. Recover and return to microwave. Cook 1 to 2 minutes until cheese melts.
To freeze: Place in microwave-safe container; label and freeze for up to 2 months. To serve: Thaw. Cover with microwave-safe plastic wrap, and cook on high 3 to 5 minutes.