Brown meat and onion in hot fat, add tomatoes, rice, Worcestershire sauce, salt and pepper. Cover and simmer until rice is almost tender, about 5 minutes. Add cheese. Stuff peppers. Stand upright in a baking dish. Bake, uncovered in 350 degree oven for 25 minutes. While still hot, sprinkle with more cheese.

If using uncooked rice, add 1/2 cup rice to 1 cup water and cook until all water is absorbed.