Preheat the oven to 375°F (190°C).

In a skillet over medium heat, cook the ground beef until browned. Drain excess fat.

In a mixing bowl, combine cooked rice, tomato sauce, garlic powder, onion powder, Italian seasoning, salt, and pepper.

Add the cooked ground beef to the rice mixture and stir until well combined.

Fill each halved bell pepper with the stuffing mixture.

Place the stuffed peppers in a baking dish and cover with foil.

Bake in the preheated oven for 25 minutes.

Remove foil, sprinkle shredded cheese on top, and bake for an additional 5 minutes until cheese is melted.