Preheat the oven: Set it to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Prep the peppers: Slice off the tops, remove seeds and membranes.
If they don’t stand upright, shave a thin layer off the bottom to level them. Place them cut-side up in the baking dish.
Par-cook the peppers (optional but helpful): Microwave the empty peppers for 3–4 minutes, or bake them uncovered for 10 minutes. This softens them so everything cooks evenly.
Cook the aromatics: Heat olive oil in a large skillet over medium.
Add onion and a pinch of salt. Cook 3–4 minutes until translucent. Stir in garlic for 30 seconds.
Brown the turkey: Add ground turkey.
Break it up with a spatula. Season with salt, pepper, oregano, cumin, and smoked paprika. Cook until no longer pink, about 5–6 minutes.
Add tomatoes and sauce: Stir in drained diced tomatoes and tomato sauce.
Let it simmer 3–4 minutes to thicken slightly.
Fold in rice: Add cooked rice and mix well. Taste and adjust seasoning with more salt, pepper, or red pepper flakes.
Stuff the peppers: Spoon the filling into each pepper, packing it gently. Mound the tops slightly.
Add moisture: Pour broth into the bottom of the baking dish (not over the peppers).
This creates steam and keeps peppers tender.
Bake: Cover the dish with foil and bake for 25 minutes.
Add cheese: Remove foil, top each pepper with shredded cheese, and bake another 8–10 minutes until melted and bubbly. If you like browned tops, broil for 1–2 minutes.
Finish and serve: Let peppers rest 5 minutes. Garnish with chopped parsley or cilantro.
Serve warm with a side salad or roasted veggies.