Creating the perfect Christmas Morning Casserole can be a breeze when following these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish with cooking spray or butter.
2. Prepare the Bread: Cube the loaf of bread and place it evenly in the greased baking dish.
3. Cook the Sausage (if using): In a skillet over medium heat, cook the breakfast sausage until browned. Drain excess fat and sprinkle it over the cubed bread.
4. Whisk the Eggs: In a large bowl, whisk together the eggs, milk, salt, black pepper, garlic powder, and onion powder until well combined.
5. Pour the Egg Mixture: Pour the egg mixture evenly over the cubed bread and sausage in the baking dish. Ensure every piece is coated.
6. Add Cheese and Veggies: Sprinkle cheddar cheese, chopped bell peppers, and green onions over the mixture for added flavor and color.
7. Cover and Refrigerate: If preparing ahead, cover the dish with plastic wrap and refrigerate overnight. If baking immediately, skip this step.
8. Bake the Casserole: Remove the casserole from the refrigerator while the oven is preheating. Bake for 40-45 minutes or until the eggs are set and the top is golden brown.
9. Let it Cool: Once baked, allow the casserole to cool for 5-10 minutes before serving, making it easier to cut into squares.
10. Cut and Serve: Slice into portions and serve warm for the best taste.

These simple steps will guide you in creating a delicious Christmas Morning Casserole that delights everyone at your holiday gathering.