Follow these straightforward steps to prepare your Biscuits and Gravy Breakfast Casserole:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook the Sausage: In a large skillet over medium heat, cook the breakfast sausage until browned. Break it apart with a spatula as it cooks.
3. Make the Gravy: Once the sausage is cooked through, sprinkle the flour over the sausage. Stir until well combined and cook for 1-2 minutes. Slowly pour in the milk, stirring constantly until the mixture thickens. Season with salt and pepper.
4. Prepare the Biscuits: While the gravy thickens, cut the biscuits into quarters and set them aside.
5. Mix the Eggs: In a large bowl, whisk together the eggs and Worcestershire sauce. Set aside.
6. Assemble the Casserole: Grease a 9×13 inch baking dish. Evenly spread the biscuit pieces in the bottom of the dish. Pour the sausage gravy over the biscuits, making sure they are well coated. Then, pour the egg mixture over the gravy.
7. Add the Cheese: Sprinkle the shredded cheddar cheese evenly over the top of the casserole.
8. Bake: Place the baking dish in the preheated oven and bake for 30-35 minutes, or until the casserole is set and golden brown on top.
9. Garnish: Remove from the oven and let it cool for a few minutes. If desired, garnish with chopped parsley before serving.

These straightforward instructions will guide you in creating this comforting breakfast casserole with ease.