Grease a 9x13 casserole dish and set aside.
Cut each biscuit into 8 pieces and set aside.
In a medium pan, brown the sausage until fully cooked. Drain the excess fat and set the sausage aside.
In a bowl, mix the eggs, 1/2 cup milk, 1/2 tsp salt, and 1/2 tsp pepper. Set aside.
In a saucepan, melt the butter. Stir in flour, salt, and pepper, and slowly add the milk. Add more milk until you’ve reached the desired consistency. Simmer, stirring, until it’s thickened.
In the greased 9x13 casserole dish, layer the biscuits in an even layer on the bottom and then top with sausage, cheese, egg mixture, and gravy.
Bake at 350°F/180°C for 35-45 min, until the eggs on the bottom are cooked. Enjoy!