Creating Biscuits and Gravy Breakfast Casserole is straightforward when you follow these simple steps:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C). Grease a 9×13-inch baking dish.
2. Cook Sausage: In a skillet over medium heat, cook the sausage until browned and crumbly. Drain excess grease and set aside to cool slightly.
3. Prepare Biscuits: Open the can of refrigerated biscuit dough. Cut each biscuit into quarters and set aside.
4. Whisk Eggs and Milk: In a mixing bowl, whisk together the eggs, milk, salt, and pepper until well combined.
5. Layer Biscuits: Spread the biscuit pieces in the bottom of the greased baking dish.
6. Add Sausage: Distribute the cooked sausage evenly over the biscuits.
7. Add Cheese: Sprinkle shredded cheddar cheese evenly over the sausage layer.
8. Pour Egg Mixture: Slowly pour the egg and milk mixture over the layers, ensuring it seeps through the biscuits.
9. Add Gravy: Drizzle the prepared gravy over the top of the casserole.
10. Bake: Place the casserole in the preheated oven and bake for 30-35 minutes, or until the eggs are set and the top is golden brown.
11. Cool: Once baked, remove the casserole from the oven and let it cool for about 5-10 minutes.
12. Garnish: Optional: Top with chopped green onions for added flavor and color.

These steps will guide you through creating this delicious and comforting casserole effortlessly.