01 - Preheat oven to 375°F. Bring a large pot of salted water to a boil. Blanch the bell peppers for 3 minutes, then drain and set aside cut-side up in a baking dish.
02 - In a large skillet over medium heat, cook ground beef until browned, breaking it up with a spoon for about 5 minutes. Drain excess fat if needed.
03 - Add onion, celery, chopped green pepper, and garlic to the skillet. Sauté for 4–5 minutes until softened.
04 - Stir in diced tomatoes, tomato paste, Creole seasoning, thyme, paprika, cayenne, salt, and black pepper. Cook for 2–3 minutes.
05 - Remove from heat. Stir in cooked rice and parsley until evenly combined.
06 - Spoon the beef and rice mixture evenly into each bell pepper.
07 - In a small bowl, mix tomato sauce, broth, and Creole seasoning. Pour around the stuffed peppers in the baking dish. Cover tightly with foil and bake for 30 minutes.
08 - Remove foil, sprinkle cheese on top of peppers if using, and bake uncovered for 10–15 minutes more until peppers are tender and cheese is melted. Garnish with fresh parsley before serving.