Split peppers lengthwise and remove seeds and pithy material.
Brown ground beef and drain.
Add garlic powder, onion powder, Worcestershire and ketchup to skillet.
Cook until heated through.
Add rice mix well.
Preheat oven to 350.
Spray baking sheet with non-stick spray.
Place split peppers on baking sheet and fill with meat mixture.
Top each pepper with shredded cheese.
Bake for 20-25 minutes or until cheese is melted.