Breakfast Bread Pudding Recipe

In a large bowl combine butter, egg yolks, milk, mustard, salt and cayenne pepper. Stir in bread cubes and cheese. In another bowl, beat egg whites until soft peaks form; fold into bread mixture. Pour into a greased 9-in. square baking dish. Cover and chill for 8 hours or overnight. Remove from refrigerator 30 minutes before baking. Bake, uncovered, at 350° for 40-45 minutes or until a knife inserted near the center comes out clean. Let stand 5 minutes before cutting. Yield: 6-8 servings.