1. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add sausage to pan; cook 5 minutes or until browned, stirring to crumble. Drain.
2. Combine sausage, bread, and 1/2 cup cheese in a large bowl. Combine milk, egg whites, and mustard in a separate bowl, stirring with a whisk. Pour milk mixture over bread mixture, tossing until bread is moistened. Arrange bread in a 13 x 9inch glass or ceramic baking dish coated with cooking spray. Cover and refrigerate 8 hours or overnight. Uncover and sprinkle with remaining 1/4 cup cheese.
3. Preheat oven to 350°.
4. Bake, uncovered, at 350° for 1 hour and 5 minutes or until set and lightly browned. Let stand 15 minutes before serving.
Young Chefs can:
Tear bread into cubes
Measure bread cubes in measuring cups
Older Chefs can:
Combine sausage, bread, and cheese