Making this Chicken Broccoli Rice Casserole is a breeze if you follow these simple steps:

1. Preheat your oven to 350°F (175°C).
2. Prepare an 8×8 inch baking dish by lightly greasing it with olive oil or cooking spray.
3. Cook the Rice: In a medium saucepan, cook the brown rice according to package instructions, using chicken broth instead of water for added flavor.
4. Cook the Broccoli: If using fresh broccoli, steam or blanch the florets until they are tender but still bright green. If using frozen, microwave them according to package instructions.
5. Mix Ingredients: In a large bowl, combine the cooked chicken, cooked rice, steamed broccoli, cream of mushroom soup, garlic powder, onion powder, black pepper, and salt. Stir until well mixed.
6. Add Cheese: Fold in 3/4 cup of the shredded cheddar cheese into the mixture, reserving the rest for topping.
7. Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it evenly.
8. Add Topping: If desired, sprinkle breadcrumbs over the top of the casserole for added crunch. Then, add the remaining shredded cheese on top.
9. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the cheese is melted, and the casserole is heated through.
10. Cool Slightly: Once done, remove from the oven and let the casserole cool for about 5 minutes before serving.

These steps will make creating Chicken Broccoli Rice Casserole an enjoyable experience, leading to an incredibly tasty result.