Spread in layers in 9x13 pan:

2 cans (16 oz.) sauerkraut
1 pkg. (8 oz.) uncooked noodles

Mix together and spoon over top:

2 cans Cream of Chicken soup
1 1/3 cups milk
3 Tbsp. yellow prepared mustard
1/2 cup chopped onion

Sprinkle the following in layers over top of soup layer:

2 cans (12 oz.) corned beef (crumbled)
2 cups grated Swiss cheese
1 cup toasted rye bread crumbs
2 Tbsp. margarine (melted)

Cover tightly and bake for 1 hour at 350ºF.