Creating Chicken Potato Broccoli Casserole is easy if you follow these detailed steps:

1. Preheat the Oven: Start by preheating your oven to 375°F (190°C).
2. Prepare the Ingredients: Cook the diced potatoes in boiling water until tender, around 10 minutes. Drain and set aside.
3. Cook Broccoli: In the same pot, add the broccoli florets and blanch them in boiling water for 3 minutes. Drain and set aside.
4. Mix Chicken and Sauce: In a large mixing bowl, combine shredded chicken, cream of chicken soup, milk, garlic powder, onion powder, salt, and pepper. Mix well to create the sauce.
5. Combine Ingredients: Add the cooked potatoes and broccoli to the chicken mixture. Gently fold the ingredients together until everything is evenly coated.
6. Transfer to Baking Dish: Lightly grease a 9×13-inch casserole dish with olive oil. Pour the mixture into the dish, spreading it evenly.
7. Add Cheese: Top the casserole with shredded cheddar cheese, covering the entire surface.
8. Bake: Place the casserole in the preheated oven and bake for 30-40 minutes, or until the cheese is melted and bubbly, and the casserole is heated through.
9. Cool Slightly: Once done, remove the casserole from the oven and let it cool for about 5-10 minutes before serving.

These straightforward steps will help you create a Chicken Potato Broccoli Casserole that’s sure to delight everyone at the table.