On a lightly floured surface roll out 3/4 of dough to a 13 x 9 inch rectangle. Line a greased 8½ x 4½ x 2½ inch loaf pan with dough. In a medium-size bowl combine spinach (make sure it is squeezed of excess liquid) with Parmesan cheese, egg and basil; set aside. Place 1/2 of the sliced Mozzarella cheese in the bottom of the pan, top with cooked sausages, sauce, spinach mixture, remaining Mozzarella, pepperoni slices and top with olives. Roll out remaining ¼ loaf of dough and cover filling. sealing the edges. Cut off excess dough. Cut two slits on top to allow steam to escape. Bake at 375° for 35-40 minutes or until crust is well browned and loaf sounds hollow when tapped. Remove from oven and allow loaf to sit in pan for 15 minutes. Remove from pan and allow to cool for at least one hour. (Loaf slices more easily when cool.)