Spread roll halves with butter; sprinkle with garlic powder. Set aside.
In a small skillet, saute the green pepper, onion, salt and pepper in 1 tablespoon oil until tender. Remove and keep warm. In the same skillet, saute beef and hot sauce in remaining oil until heated through. Spoon onto buns; top with pepper mixture and cheese.
Place on a baking sheet. Broil 2-3 in. from the heat for 2-4 minutes or until cheese is melted. Yield: 2 servings.