01 - Set oven to 375°F for baking.
02 - Cut tops off bell peppers, remove seeds and white membranes. Stand peppers upright in baking dish.
03 - Heat olive oil in large skillet over medium heat. Add onion, celery, and chopped green bell pepper. Cook 3–4 minutes until softened.
04 - Stir in minced garlic and cook 1 minute until fragrant.
05 - Add ground beef to skillet. Break apart with spoon and cook 5–7 minutes until fully browned. Drain excess fat if needed.
06 - Add diced tomatoes, Creole seasoning, smoked paprika, thyme, oregano, cayenne if using, salt, and pepper. Simmer 5 minutes.
07 - Remove from heat. Stir in cooked rice and tomato sauce until evenly distributed.
08 - Fill each bell pepper with beef and rice mixture, pressing gently to pack.
09 - Pour broth into bottom of baking dish around stuffed peppers.
10 - Cover dish tightly with aluminum foil. Bake 35 minutes.
11 - Remove foil. Sprinkle cheddar cheese on tops if desired. Bake uncovered 10 minutes until peppers tender and cheese melted.
12 - Let peppers rest 5 minutes to settle before serving.