Thaw the puff pastry sheet enough so that it will unfold without cracking. Brush off any excess flour that may be on the surface. Gently spread the Francesco Rinaldi Marinara Pasta Sauce in a very thin layer over the entire surface of the puff pastry (the thinner the layer, the easier it is to work with). Sprinkle the entire surface of the pizza sauce with grated Parmesan cheese. If desired, sprinkle with finely chopped pepperoni and lightly press into the sauce.