1. Preheat your oven to 375°F (190°C). Grease a 9×13 casserole dish and set it aside — don’t forget this step like I always do.
2. Heat a large skillet over medium heat. Add the ground turkey and cook, breaking it up with a spoon, until nicely browned — let it sit for a minute before stirring so you get some color on it.
3. Add the diced onion and minced garlic to the skillet. Cook for about 3-4 minutes until softened and fragrant.
4. Stir in the cauliflower florets, diced tomatoes with their juice, chicken broth, oregano, paprika, salt, and pepper. Mix everything together and let it simmer for 5-7 minutes — just long enough to take the raw edge off the cauliflower, not so long that it goes soft.
5. Transfer the mixture to your prepared casserole dish and spread it out evenly. Sprinkle the shredded cheddar generously over the top.
6. Cover tightly with foil and bake for 25 minutes. Remove the foil and bake for another 10 minutes until the cheese is golden and bubbly.
7. Let it cool for about 5 minutes before serving — if you can wait that long.

Nutrition Information (Per Serving, based on 5 servings)

• Calories: 290
• Carbohydrates: 10g
• Protein: 28g
• Fat: 15g
• Fiber: 3g
• Sodium: 580mg
• Vitamin C: ~70% DV (from cauliflower)
• Calcium: ~20% DV (from cheddar cheese)

Notes

• Seriously, don’t skip the browning step on the turkey — pale steamed turkey has way less flavor.
• Shred your own cheese if you can. It really does melt better.
• Every oven runs a little differently, so start checking the cheese at the 30-minute mark.
• Want more sauce? Add an extra half-can of diced tomatoes to the skillet.

Storage Tips

• Refrigerate leftovers in an airtight container for up to 4 days.
• Reheat covered in a 350°F oven with a splash of broth to keep it moist. The microwave works but softens the cauliflower.
• To freeze: assemble before baking, wrap tightly, freeze up to 2 months. Thaw overnight in the fridge before baking.

Serving Suggestions

• Serve over steamed white or brown rice to stretch the casserole further.
• A simple green salad with lemon vinaigrette cuts through the richness perfectly.
• Crusty bread on the side for scooping up all the saucy tomato bits.
• Works great as a meal-prep lunch — it reheats well and keeps the flavors tight.

Mix It Up

Spicy Turkey Casserole: Swap cheddar for pepper jack and add ½ tsp red pepper flakes to the skillet. Harvest Turkey Casserole: Add 1 diced sweet potato and a pinch of cinnamon along with the paprika for a cozy seasonal twist. Dairy-Free Version: Use a good dairy-free shredded cheddar or top with seasoned breadcrumbs instead. Low-Carb Version: Swap the chicken broth for an extra half-can of diced tomatoes and skip any rice pairings.

What Makes This Recipe Special

This turkey and cauliflower casserole skips the heavy cream soups of old-school casserole recipes in favor of a lighter tomato-and-broth base that keeps everything savory without feeling weighed down. The combination of lean ground turkey and fiber-rich cauliflower makes it a genuinely satisfying meal that doesn’t leave you reaching for snacks an hour later. It’s weeknight practicality at its very best.