Instructions

1. The night before, cook sausage and onion over medium-high heat in a nonstick skillet until sausage is no longer pink. Drain and cool.
2. In a large bowl, beat the eggs, egg whites, milk, mustard, salt and pepper. Stir in the bread cubes, cheese and sausage mixture. Pour into a 13 x 9 inch baking dish coated with cooking spray. Cover and refrigerate overnight.
3. Remove from the refrigerator 30 minutes before baking. Bake, uncovered, at 350 degrees F for about 35 to 40 minutes or until a knife inserted near the center comes out clean. Let stand for 5 minutes before cutting. Enjoy!