Make-ahead pizza casserole

Casseroles Italian cuisine

1 lb mild Italian pork sausage 2 cups water 1 can (15 oz) pizza sauce 1 can (14.5 oz) diced tomatoes with sweet onion, undrained 4 cups uncooked rotini pasta (10 oz) 1 can (2¼ oz) sliced ripe olives, drained 1½ cups shredded mozzarella or pizza cheese blend (6 oz)