On A Lightly Floured Surface, Unroll Dough At Seam. Pat Dough Into A 14-In. X 12-In. Rectangle. Sprinkle Mozzarella Cheese Over Dough To Within 1/2 In. Of Edges. Top With A Single Layer Of Ham. Roll Up Tightly From A Short Side; Pinch Seam To Seal. Place Seam Side Down On An Ungreased Baking Sheet. Brush Top Of Loaf With Butter; Sprinkle With Parmesan Cheese. Bake At 375 Degrees F For 20-25 Minutes Or Until Golden Brown. Cool On A Wire Rack For 5 Minutes. Cut With A Serrated Knife.