HEAT oven to 400°F.
UNROLL dough; cut into 16 equal pieces.
SPOON mozzarella onto centres of ham pieces. Fold ham over cheese, then roll up. Place 1 roll-up near one side of each dough piece; fold dough in half. Press edges together to seal; place on baking sheet sprayed with cooking spray. Brush with water. Sprinkle with Parmesan.
BAKE 12 to 15 min. or until golden brown. Serve warm.