Preheat your oven to 375°F (190°C).
Wash and cut the tops off the bell peppers. Remove the seeds and membranes. Set aside.
Cook the rice according to package instructions, but slightly undercook it since it will cook further in the oven. Drain and set aside.
Heat vegetable oil in a large skillet over medium heat. Add the chopped onion and cook until translucent, about 5 minutes.
Add the minced garlic and cook for an additional 1 minute.
Add the ground meat to the skillet and cook until browned and cooked through. Drain any excess fat.
Stir in the cooked rice, tomato sauce, paprika, oregano, basil, salt, and black pepper. Mix well and cook for another 5 minutes to combine the flavors. Remove from heat.
Spoon the filling mixture into each bell pepper, packing it down slightly. Place the stuffed peppers in a baking dish.
If using cheese, sprinkle it on top of the stuffed peppers.
Cover the baking dish with aluminum foil and bake in the preheated oven for 30 minutes.
Remove the foil and bake for an additional 10-15 minutes, or until the peppers are tender and the cheese (if used) is melted and bubbly.
Garnish with fresh chopped parsley if desired.
Enjoy your meal!