Pare eggplant and cut in 1/4" slices. Fry on both sides in oil in skillet until brown and drain well on absorbent paper. Put layer of eggplant slices in shallow baking dish. Cover with some sauce, a little Parmesan cheese and a few slices mozzarella. Repeat layers until all ingredients are used, ending with mozzarella. Bake in hot oven (400F) for 15 minutes, or until thoroughly heated. Makes 4 to 6 servings.