Preheat the oven to 375. Lightly grease a 9 x 13 baking dish. Roll the pizza dough out into a large rectangle and spread with the marinara sauce, leaving a margin of one inch around the edges. Sprinkle the mozzarella cheese evenly over the dough, then top with the pepperoni. Sprinkle 2 tablespoons of parmesan cheese over the top. Roll up the dough gently, starting at the long edge. Cut dough into one inch slices. Place cut side up in the prepared pan. Sprinkle with the remaining parmesan cheese. Bake 15-20 minutes, until golden brown on top.