Grease 9x13 pan
Brown the sausage in a skillet and drain
Cut biscuits into 1" pieces and line bottom of the greased pan
Layer sausage over biscuit pieces
Layer shredded cheddar cheese over sausage
Whisk together eggs, 3/4 c. milk, 1/2 t. salt, 1/2 t. pepper and dash of cayenne pepper.
Pour egg mixture over the biscuits. Cover with tin foil and place in your refrigerator until morning.
Next, mix up the gravy.
Melt 5 T. of butter in saucepan. Once melted, whisk in 5 T. flour until paste-like. Add in 1/2 t. salt and 1/2 t. pepper
With heat on low, gradually whisk in 1 1/2 c. of milk and stir constantly until mixture becomes thick and gravy-like. Once your gravy is done, set aside to cool. Place gravy in the refrigerator until morning.
Morning - preheat oven to 350
Pour gravy mixture over egg casserole and place in oven covered for 35 minutes.
Uncover and bake for 10-15 more minutes until eggs are thoroughly baked and cheese starts to turn golden brown.
Enjoy! Left-overs are just as amazing!