In a large pot of boiling water, cook macaroni until tender; drain and cool. In a large bowl, combine the corned beef, cheese, sauerkraut, caraway seed, and Russian dressing. Add cooked macaroni and toss thoroughly. Serve with tomato wedges, if desired.
NOTE: If you don't like sauerkrait, drained coleslaw works just as well. Also, you can make your own Russian dressing by mixing 1/2 cup mayonnaise with 3 tablespoons ketchup.