Creating a delicious Breakfast Sausage Casserole can be straightforward if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
2. Cook Sausage: In a large skillet over medium heat, cook the breakfast sausage until browned. Break it apart while cooking for even crumbling.
3. Whisk Eggs: In a separate bowl, whisk together the eggs, milk, salt, pepper, garlic powder, onion powder, and Dijon mustard until well combined.
4. Prepare Bread Cubes: Place the bread cubes evenly in the greased baking dish.
5. Add Sausage: Sprinkle the cooked sausage over the bread cubes.
6. Add Cheese: Pour half of the scrambled egg mixture over the sausage and bread. Then sprinkle half of the shredded cheese on top.
7. Layer Remaining Ingredients: Pour the remaining egg mixture over the casserole. Top with the remaining cheese.
8. Bake: Cover the dish with aluminum foil and bake in the preheated oven for 30 minutes. Then, remove the foil and bake for an additional 10-15 minutes or until the eggs are set and the cheese is bubbly and golden.
9. Cool: Once done, remove from the oven and allow it to cool for 5-10 minutes for easier slicing.
10. Garnish: Garnish with fresh parsley or chives, if desired, before serving.

Following these steps will guide you in creating this incredible casserole that’s sure to impress!