01 - Preheat the oven to 375°F.
02 - Slice the tops off the bell peppers and remove seeds and membranes. Set aside.
03 - Heat olive oil in a large skillet over medium heat. Add onion, celery, carrot, and garlic. Sauté until softened, about 5 minutes.
04 - Add diced sausage and cook for an additional 3 minutes, stirring occasionally.
05 - Stir in diced tomatoes, Creole seasoning, smoked paprika, thyme, cayenne (if using), salt, and pepper. Cook for 2 minutes.
06 - Add cooked rice to the skillet and mix well. Adjust seasoning if needed.
07 - Arrange peppers upright in a baking dish. Spoon the rice mixture evenly into each pepper.
08 - Pour broth into the bottom of the baking dish. Cover with foil and bake for 30 minutes.
09 - Remove foil, sprinkle cheese on top (if using), and bake uncovered for another 10 minutes, until peppers are tender and cheese is melted.
10 - Let cool slightly before serving.