Preheat your oven to 375°F. Place the bell peppers cut side up in a baking dish to prepare them for stuffing.
Heat olive oil in a large pan over medium heat. Sauté the diced onion until softened, then add the minced garlic and cook for another minute.
Add the ground beef to the pan. Cook until browned, breaking it up as it cooks, for about 5–6 minutes.
Stir in the cooked rice, diced tomatoes, tomato paste, oregano, and paprika. Season with salt and pepper. Cook for about 4–5 minutes until the flavors meld.
Fill each pepper generously with the beef and rice mixture. Bake in the oven until the peppers are tender, approximately 10–12 minutes.
Sprinkle the top of each stuffed pepper with shredded cheese. Continue baking for an additional 5–7 minutes until the cheese is melted and bubbly.
Garnish with freshly chopped parsley before serving for a fresh touch of color and flavor.
Notes
For extra tender peppers, pre-roast them for 5 minutes before stuffing.
You can also substitute brown rice with quinoa or white rice.
Experiment with different cheeses or add breadcrumbs for added crunch.