1. Preheat the oven to 375°F (190°C) and grease a 9×13-inch casserole dish.

2. In a large bowl, combine the turkey, broccoli, and cooked rice or pasta if using.

3. In a separate bowl, whisk together soup or white sauce, milk, garlic powder, onion powder, salt, and pepper until smooth.

4. Pour the sauce over the turkey mixture and stir to coat evenly.

5. Stir half of the shredded cheese into the mixture, then transfer everything to the prepared casserole dish and spread evenly.

6. Sprinkle the remaining cheese over the top.

7. In a small bowl, mix breadcrumbs with melted butter and sprinkle over the cheese layer.

8. Bake uncovered for 25–30 minutes if ingredients are room temperature, or 35–40 minutes if cold, until bubbly and golden.

9. Let rest for 5 minutes before serving.