Making Turkey Broccoli Casserole is straightforward when you follow these easy steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Dish: Grease a 9×13-inch baking dish with cooking spray or butter.
3. Cook Broccoli: Steam the broccoli florets until tender but still bright in color, about 4-5 minutes. Set aside.
4. Combine Ingredients: In a large bowl, mix the cooked turkey, steamed broccoli, cooked rice, cream of mushroom soup, milk, garlic powder, onion powder, and black pepper until well combined.
5. Layer the Mixture: Pour the turkey mixture into the prepared baking dish and spread it evenly.
6. Add Cheese: Sprinkle the shredded cheddar cheese evenly on top of the turkey mixture.
7. Prepare Breadcrumbs: In a small bowl, combine breadcrumbs with melted butter. Mix until the breadcrumbs are evenly coated.
8. Top with Breadcrumbs: Evenly distribute the breadcrumb mixture over the cheese layer.
9. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes or until bubbly and golden brown on top.
10. Cool: Allow the casserole to cool for 10-15 minutes before serving to let it set.

Following these steps will guide you to successfully create this wonderful dish, perfect for any occasion.