Creating the delicious Hashbrown Breakfast Casserole is straightforward if you follow these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Baking Dish: Grease a 9×13 inch baking dish with cooking spray or oil.
3. Cook Meat: If using sausage or bacon, cook it in a skillet over medium heat until browned. Drain excess fat and set aside.
4. Mix Hashbrowns: In a large bowl, combine the shredded hashbrowns, cooked meat, diced onion, and bell pepper. Mix until well blended.
5. Layer Ingredients: Spread the hashbrown mixture evenly in the prepared baking dish. Press down gently.
6. Whisk Eggs and Milk: In another bowl, whisk together the eggs, milk, salt, pepper, and garlic powder until fully combined.
7. Pour Mixture: Pour the egg mixture evenly over the hashbrown layer in the baking dish.
8. Top with Cheese: Sprinkle the shredded cheddar cheese on top of the egg mixture.
9. Bake: Place the casserole in the preheated oven and bake for 45-50 minutes, or until the top is golden brown and the eggs are set.
10. Cool: Once cooked, allow the casserole to cool for a few minutes before slicing into squares for serving.

By following these steps, you can prepare a wonderful Hashbrown Breakfast Casserole that will surely delight everyone.