Cook sausage in pan (brown slightly) then set aside.
Grease 9X13 dish.
Soften onion in pan
Cook gravy mix according to packet instructions.
Cut biscuits into fourths and line the bottom of 9X13 dish.
Combine gravy, onion and sausage.
Pour a layer over biscuits and top with cheddar cheese.
Mix eggs in a bowl and add salt and pepper.
Pour eggs as next layer.
Add remaining gravy to the top of eggs and cover with remaining cheese.
Bake at 350 degrees for 35-45 minutes.