In a large skillet or frying pan, saute beef and onions in 1 tablespoon of olive oil.
Stir rice, lemon pepper, garlic powder, onion powder, and salt into beef and onion mixture.
Slice the tops off of the bell peppers and clean the seeds out. Keep the tops.
Spoon 1/4 cup of filling into hollowed out pepper. Sprinkle with 1 tbsp shredded cheese. Add one more layer of filling and one more layer of cheese. Replace the top and place in a deep casserole dish. – Repeat for each pepper.
(Repeat until all peppers have been filled.)
Drizzle remaining olive oil all over peppers; sprinkle with salt and pepper.