You can substitute 3 egg whites for the 1/2 cup butter.
Ingredients:
Directions:
In a shallow bowl, combine the breadcrumbs, Parmesan cheese, zest and thyme leaves. Dip chicken in butter (or egg whites) mixed with Dijon, then roll in breadcrumb mixture to coat. Place in a greased 9x13 baking dish.
Bake, uncovered, at 350 for 45 minutes or until chicken juices run clear.