Flatten chicken to 1/4-in. thickness
Top each with a slice of ham and cheese.
Roll up and tuck in end and secure with toothpicks.
In a shallow bowl, combine the flour, salt, paprika and pepper.
In another bowl, whisk egg and milk.
Place bread crumbs in a third bowl.
Dip chicken in flour mixture, then egg mixture; roll in crumbs.
In a small skillet, brown chicken in oil on all sides.
Transfer to an 8-in. square baking dish coated with cooking spray.
Bake, uncovered, at 350° until a thermometer reads 170°, for 20-25 minutes.
Discard toothpicks; drizzle with butter.