Meatball Sub Casserole  1 loaf Italian bread, cut into 1-inch thick slices  8-oz. pkg. cream cheese, softened  1/2 c. mayonnaise  1 t. Italian seasoning  1/4 t. pepper  2 c. shredded mozzarella cheese, divided  1-lb. pkg. frozen meatballs, thawed  28-oz. jar pasta sauce  1 c. water    Arrange bread slices in a single layer in an ungreased 13&quot;x9&quot; baking pan  bake 350 30 min