Place chicken pieces, top sides down, on work surface; top with prosciutto and cheese. Roll up tightly, starting at one short end of each; spread with mustard.
Place flour in shallow dish; whisk eggs in pie plate. Mix remaining ingredients in separate pie plate. Dip chicken in flour, then egg, then crumb mixture, turning to evenly coat each roll-up. Gently press crumb mixture into chicken. Place, seam sides down, on parchment-covered baking sheet.
Bake 25 to 30 min. or until chicken is done (170 degrees F).
Chicken roll-ups can be grilled on the barbecue instead of baked in the oven. Heat
barbecue for indirect grilling: Light one side of barbecue, leaving other side unlit. Close
lid; heat barbecue to 350 degrees F. Place chicken roll-ups on baking sheet sprayed with
cooking spray. Place baking sheet on grate over unlit area; cover. Grill 35 to 40 min. or
until chicken is done (170 degrees F), monitoring for consistent grill temperature.