PREHEAT oven to 350°F. Place chicken, top-sides down, on large cutting board. Spread each breast with 1 tsp. mustard; top with 3 ham slices and 1 cheese slice. Starting at one of the short ends, tightly roll up chicken.
DIP chicken in egg product, then roll in bread crumbs until evenly coated on all sides. Place, seam-sides down, in single layer in shallow lightly greased baking dish.
BAKE 25 min. Cover loosely with foil; bake an additional 15 to 20 min. or until chicken is cooked through (170°F).