01 - Preheat oven to 375°F. Lightly grease a baking dish large enough to hold the stuffed peppers upright.
02 - In a large skillet over medium heat, cook the ground beef and kielbasa until browned, approximately 7 minutes. Drain any excess fat.
03 - Add the diced onion and minced garlic to the skillet. Sauté for 3-4 minutes until softened and fragrant.
04 - Stir in the cooked rice, drained diced tomatoes, 4.25 oz shredded cheddar cheese, parsley, smoked paprika, oregano, salt, and black pepper. Mix thoroughly until all ingredients are evenly distributed.
05 - Spoon the cheesy beef-rice filling into each prepared bell pepper, pressing gently to pack the filling securely.
06 - Place the stuffed peppers upright in the prepared baking dish, ensuring they stand steady.
07 - Pour the beef broth around the base of the peppers, adding moisture to the dish.
08 - Cover the baking dish tightly with aluminum foil. Bake for 30 minutes to steam the peppers.
09 - Remove the foil and sprinkle the remaining 1.5 oz shredded cheddar cheese over each pepper. Return to the oven and bake uncovered for 15 minutes, until the cheese is golden and bubbly and peppers are tender.
10 - Let the stuffed peppers rest for 5 minutes before serving. Garnish with additional fresh parsley if desired.