Prepare rice according to directions.
Bring a large pot of water to a boil over high heat. Cut tops off of bell peppers and remove seeds and insides. Add peppers to boiling water and keep completely under water for about 3 minutes. Drain and set aside.
Heat olive oil in a skillet over medium heat. Cook onions and garlic until onions are soft, about 5 minutes. Remove from heat.
Preheat oven to 350 degrees. In a medium sized bowl, mix rice, onion, garlic, meat, tomatoes, and seasonings until well blended.
Drizzle a small amount of olive oil inside the peppers and arrange in a baking dish. Stuff the peppers with prepared filling. Place peppers in oven and bake for 40-50 minutes.