Breakfast Casserole Recipe

Preheat oven to 350 degrees Fahrenheit and spray a large 9 x 13-inch baking dish with non-stick cooking spray. Set aside.
Meanwhile, heat the olive oil in a large skillet over medium heat. Add the onion and cook for 2-3 minutes, or until the onion turns translucent. Add the ground sausage and cook until the sausage is fully cooked. Remove from heat and set aside.
In a medium bowl whisk together the eggs, milk, salt, black pepper, and garlic powder until fully combined.
Once the sausage has cooled, add the shredded cheese and cooked sausage to the egg mixture. Mix well.
In the bottom of your prepared 9 x 13-inch baking dish arrange the diced day-old bread in an even layer. Pour the egg and meat mixture over the top.
Cover the baking dish with aluminum foil and refrigerate for up to 12 hours (optional, but recommended).
When ready to bake, tent with foil and bake for 35 minutes, then remove the foil and bake for an additional 25 minutes or until the outside edges are firm and golden and the center isn't jiggly anymore.
Remove from the oven and allow to cool for 5 minutes before serving.