Cook peppers in boiling water for five minutes.
Cook beef and onions until beef is brown, drain. Stir in cooked rice, salt, garlic, and 1 c. of tomato sauce.
Heat oven to 350 F. Stuff peppers. Pour remaining sauce over peppers, cover, and bake 45 minutes. Uncover, sprinkle with cheese and bake another 15 minutes.
Adapted from My friend, Amanda