ricotta

2 − 10 oz. packages frozen chopped spinach − Thawed in refrigerator overnight 1 lb. ricotta cheese 3/4 lb. shredded mozzarella cheese 2 oz. grated Romano cheese 1/2 teas. black pepper 1/4 lb. (1 stick) butter or margarine, lightly melted 12 lasagna noodles 16 oz. jar spaghetti sauce (thinned...