Spread 1 tablespoon pizza sauce on half of each rectangle to within 1 inch of edge. Sprinkle each with 3 tablespoons cheese; top with 6 slices pepperoni. Fold dough from the top over filling; firmly press edges with fork to seal. Sprinkle each rectangle with 1/4 teaspoon grated cheese. With fork, prick top of each to allow steam to escape.