"I first made this breakfast version of bread pudding for our annual Memorial Day breakfast more than 10 years ago. I'm eager to try new recipes each year, but my friends and family love this so much they won't let me make anything else!"
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 degrees F for 40-45 minutes or until a knife inserted near the center comes out clean. Let stand 5 minutes before cutting.