01 - Preheat oven to 350°F.
02 - Slice off the tops of the bell peppers and remove seeds and membranes. Set aside.
03 - Heat olive oil in a large skillet over medium heat. Add onion, celery, and jalapeño (if using), and sauté for 4–5 minutes until softened.
04 - Add garlic and cook for 1 minute more until fragrant.
05 - Add ground beef to the skillet. Cook, breaking up with a spoon, until browned and cooked through (about 6–8 minutes). Drain excess fat if necessary.
06 - Stir in diced tomatoes, cooked rice, Creole seasoning, paprika, thyme, cayenne, salt, and pepper. Simmer for 3–4 minutes to blend flavors.
07 - Remove skillet from heat and stir in half the cheddar cheese.
08 - Spoon the beef and rice mixture evenly into the prepared bell peppers and set them upright in a baking dish.
09 - Top each stuffed pepper with the remaining cheddar cheese.
10 - Add a splash of water (about ¼ cup) to the bottom of the baking dish. Cover with foil and bake for 30 minutes.
11 - Remove foil and bake an additional 10–15 minutes until the peppers are tender and the cheese is golden and bubbly.
12 - Garnish with chopped parsley and serve hot.