Ziti and Cheese Casserole

1 pound ziti

¼ pound cubed mozzarella

1 egg

1 pound ricotta

½ cup grated parmesan

¼ tsp pepper

¾ tsp salt

6 cups meat sauce

Cook ziti according to package directions; drain.  In large bowl, combine cheese, egg, salt, and pepper.  In 9x13 in baking dish layer sauce, ziti, cheese filling, ending layers with meat sauce.  Bake at 350 degrees for 40 minutes.