Making the Overnight Breakfast Casserole is simple with these clear steps:

1. Prepare the Egg Mixture:In a large bowl, whisk together the eggs, milk, salt, pepper, dried mustard, and garlic powder until well combined.

2. Combine Cheese and Bread:In a separate bowl, add the cubed bread and shredded cheese. Toss them together to coat the bread evenly.

3. Add Optional Ingredients:If you’re using sausage or ham, add it to the bread and cheese mixture. Toss to combine. Incorporate the chopped vegetables as well.

4. Layer the Casserole:Grease a 9×13-inch baking dish. Evenly spread the bread mixture in the dish.

5. Pour Egg Mixture:Carefully pour the egg mixture over the bread and toppings, making sure everything is evenly coated.

6. Cover and Chill:Cover the baking dish tightly with plastic wrap. Place it in the refrigerator and allow it to chill for at least 4 hours or overnight.

7. Preheat Oven:When you are ready to bake, preheat your oven to 350°F (175°C).

8. Bake:Remove the plastic wrap and bake the casserole for 45-60 minutes until the center is set and the top is golden brown.

9. Let it Rest:Once baked, let the casserole cool for about 10 minutes before slicing.

10. Garnish:Sprinkle fresh parsley on top for a pop of color and an extra burst of flavor.

These steps will guide you through creating a delicious and satisfying Overnight Breakfast Casserole effortlessly.