In a warm oven, let the dough rise until double. Combine cheeses and pepper and set mixture aside. Roll the dough onto a very lightly flowered board into a 10x16 inch square. Spread softened butter over the entire surface of dough. Sprinkle the cheese/pepper mixture over prepared dough and roll up beginning at the 16 inch side. Fold the ends under and place on a greased cookie sheet with the seam side down. With a sharp knife cut about 3-4 slants diagonally across the top. Place in a warm oven and let rise until double again. Heat the oven to 375 degrees and bake for 20-25 minutes or until golden brown and loaf sounds hollow when tapped. Serve plain or with marinara dipping sauce.