Once you have gathered your ingredients, follow these steps to create a delightful Biscuits and Gravy Casserole:

1. Preheat Your Oven: Begin by preheating your oven to 350°F (175°C).
2. Cook the Sausage: In a large skillet over medium heat, cook the breakfast sausage until browned and fully cooked. Drain excess fat.
3. Prepare the Gravy: In the same skillet, add the cream of mushroom soup, chicken broth, milk, and black pepper. Stir until well combined and bring to a simmer. Cook for 2-3 minutes until slightly thickened.
4. Prepare the Biscuits: Open the can of refrigerated biscuits and cut each biscuit into quarters. This will help them mix well with the gravy.
5. Combine Ingredients: In a large bowl, add the cooked sausage and gravy mixture. Stir in the cut-up biscuit pieces until they are evenly coated.
6. Transfer to Baking Dish: Pour the entire mixture into a greased 9×13-inch baking dish, spreading it evenly.
7. Add Cheese (Optional): If you desire, sprinkle shredded cheddar cheese on top for an extra cheesy layer.
8. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes or until the biscuits are golden brown and cooked through.
9. Garnish: Once the casserole is baked, remove it from the oven and let it cool for a few minutes. Garnish with fresh parsley, if desired.

These straightforward steps will lead you to a delicious and satisfying casserole that everyone will enjoy.