Creating your own Cheesy Sausage Breakfast Casserole is a simple process. Follow these steps to achieve a delicious result:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Brown the Sausage: In a skillet over medium heat, cook the breakfast sausage until browned and crumbled. Drain any excess fat and set aside.
3. Whisk Eggs: In a large mixing bowl, whisk together the eggs, milk, salt, black pepper, and garlic powder until well combined.
4. Prepare Bread: Add the cubed bread to the egg mixture and stir to ensure that the bread is well-coated.
5. Combine Ingredients: Stir in the cooked sausage, shredded cheddar cheese, and diced bell peppers if using.
6. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish, spreading it evenly.
7. Bake: Place the dish in the preheated oven and bake for 35-45 minutes, or until the casserole is set and lightly golden on top.
8. Garnish: Remove from the oven and let it cool for a few minutes. Top with chopped green onions before serving.

This simple yet delicious process ensures that you’ll have a beautiful and satisfying breakfast casserole to enjoy.