Creating Quick Rotisserie Chicken Zucchini Casserole is a breeze when you follow these simple steps:

1. Preheat the Oven: Set your oven to 350°F (175°C) to get it ready for baking.
2. Prepare the Baking Dish: Lightly grease a 9×13 inch baking dish with olive oil or cooking spray.
3. Combine Ingredients: In a large mixing bowl, combine the shredded rotisserie chicken, sliced zucchini, cream of chicken soup, and milk. Stir well to combine.
4. Add Seasonings: Sprinkle in the garlic powder, onion powder, salt, and pepper. Mix until everything is evenly seasoned.
5. Layer the Mixture: Pour the chicken and zucchini mixture into the prepared baking dish. Spread it out evenly.
6. Add Cheese: Sprinkle the shredded cheddar cheese over the top of the mixture, ensuring even coverage for a cheesy top.
7. Optional Topping: If desired, add breadcrumbs on top for a crispy texture.
8. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is melted and bubbly.
9. Check Doneness: You can use a fork to check that the zucchini is tender and the mixture is heated through.
10. Serve: Remove from the oven and allow the casserole to cool for a few minutes before serving.

These straightforward steps will guide you through creating a wonderful casserole quickly and easily, ensuring that flavor is not sacrificed for speed.