Breakfast Casserole

1 cup fully cooked and drained ground sausage

1 cup shredded cheddar cheese

1 & 2/3 cup milk

1/3 cup mayonaise

1 & 1/2 tsp prepared mustard

4 eggs

1 cup Bisquick baking mix

salt and pepper to taste

Sprinkle sausage and cheese in 9 inch baking pan.  Beat remaining ingredients until smooth,  pour into dish.  Bake at 350 for 35 to 40 minutes or until knife inserted in center comes out clean.  Cool 5 minutes before cutting.  Serves 8