HEAT oven to 450°F.
FILL bread slices with 2% Milk Singles and ham.
BEAT egg whites and milk in shallow dish or pie plate. Dip each sandwich into egg mixture, turning to coat both sides (let bread soak about 5 sec. on each side). Place sandwiches on baking sheet sprayed with cooking spray.
BAKE 6 min.; turn. Bake 5 min. or until sandwiches are golden brown.