1. Preheat oven to 375°F (190°C) and lightly grease a casserole dish.
2. Cook the ground turkey in a large skillet over medium heat, breaking it up as it browns, until no pink remains. Drain any excess fat.
3. Add the diced bell peppers, chopped onion, and minced garlic to the skillet with the turkey. Sauté for about 5 minutes until the vegetables are softened and the onion is translucent.
4. Stir in the diced tomatoes with all their juices, cooked rice, oregano, paprika, salt, and pepper. Mix thoroughly and cook on the stovetop for a full 5 minutes until the tomato liquid is absorbed and the mixture is cohesive and deeply fragrant. Taste and adjust seasoning here — this is the moment.
5. Transfer the mixture to the prepared casserole dish and spread it out in an even layer. Scatter the freshly shredded cheddar evenly over the entire top.
6. Cover tightly with foil and bake for 20 minutes.
7. Remove the foil and bake for another 10 minutes until the cheese is melted, bubbling, and golden at the edges.
8. Let rest for 5 minutes before serving — it portions cleanly and tastes even better with a brief rest (if you can wait that long).

Nutrition Information (Per Serving):

• Calories: 340
• Carbohydrates: 22g
• Protein: 28g
• Fat: 15g
• Fiber: 3g
• Sodium: 510mg
• Key vitamins/minerals: Vitamin C (120% DV from bell peppers), Vitamin A (35% DV), Calcium (20% DV), Iron (15% DV) Note: Bell peppers — particularly red and yellow varieties — are among the highest vitamin C sources available in any vegetable, making this a casserole that is genuinely nutritious alongside being deeply satisfying.

Notes:

• Always cook the turkey mixture for the full 5 minutes on the stovetop after adding the tomatoes and rice — this step makes the filling cohesive and well-seasoned before it ever sees the oven.
• Freshly grated cheddar from a block melts dramatically better than pre-shredded bags — the anti-caking coating on bagged cheese prevents proper melting.
• Taste the mixture before transferring to the baking dish and season it properly — ground turkey is mild and needs generous seasoning at this stage.
• The two-stage baking method (covered then uncovered) is not optional — covered keeps moisture in, uncovered creates the golden cheddar top.

Storage Tips:

• Refrigerate leftovers in an airtight container for up to 4 days — flavor improves overnight.
• Reheat covered with foil in a 350°F oven for 15 minutes, or microwave individual portions covered for 2 minutes.
• Add a small splash of broth or water before reheating if the rice has absorbed excess moisture overnight.
• Freeze before baking for up to 3 months — thaw overnight in the refrigerator and bake as directed with 10 to 15 extra minutes added to the covered baking time.

Serving Suggestions:

• With a simple green salad dressed with red wine vinaigrette to cut through the richness of the cheesy casserole top
• Alongside warm crusty bread for scooping up the saucy, tomato-rich filling from the bottom of the dish
• With steamed or roasted broccoli for a complete, well-balanced dinner plate that comes together in the same oven
• Finished with a dollop of sour cream over each serving for a cooling, creamy contrast against the bold paprika and oregano seasoning

Mix It Up (Recipe Variations):

• Mexican-Inspired Version: Swap oregano for cumin and chili powder, add a can of drained black beans, and top with pepper jack cheese instead of cheddar.
• Mediterranean Turkey and Bell Pepper Casserole: Add Kalamata olives and dried basil to the mixture and top with crumbled feta instead of cheddar for a briny, tangy transformation.
• Spicy Version: Add half a teaspoon of red pepper flakes and a diced jalapeño with the vegetables for a building heat that plays beautifully against the sweet bell peppers.
• Low-Carb Version: Swap the cooked rice for an equal amount of cauliflower rice — it absorbs the tomato and spice mixture just as well with all the casserole satisfaction intact.

What Makes This Recipe Special:

Cooking the turkey and vegetable mixture on the stovetop for a full 5 minutes after the tomatoes and rice are added — rather than transferring immediately to the baking dish — allows the tomato liquid to absorb into the rice, the dried spices to bloom fully into the fat, and the entire filling to become genuinely cohesive before the oven finishes the job. The two-stage baking method of covered then uncovered keeps the interior moist and the rice tender through the full bake while creating the golden, bubbling cheddar crust that makes this turkey and bell pepper casserole as visually satisfying as it is delicious in every single bite.