Preheat your oven to 375°F (190°C).

Cut the tops off the bell peppers and remove the seeds.

In a large skillet over medium heat, brown the ground beef or turkey until fully cooked.

Add the chopped onion and minced garlic to the skillet and sauté until softened, about 3-4 minutes.

In a mixing bowl, combine the cooked rice, cooked meat mixture, diced tomatoes, Italian seasoning, salt, and black pepper. Mix well.

Spoon the filling into each bell pepper, pressing down gently.

Place the filled peppers upright in a baking dish and bake for 25-30 minutes until the peppers are tender.

If desired, sprinkle cheese on top of the peppers during the last 5 minutes of baking.