Heat oven to 350°F. Spray cookie sheet with nonstick cooking spray. Unroll dough; separate into 2 rectangles. Place 1 dough rectangle on sprayed cookie sheet.
Sprinkle pepperoni and mozzarella cheese evenly over dough. Top with remaining dough rectangle. Sprinkle with Parmesan cheese.
Bake at 350°F. for 17 to 25 minutes or until breadsticks are golden brown. Pull breadsticks apart along perforations; serve with warm pizza sauce for dipping.