Reuban Casserole

2 16-ounce cans sauerkraut, drained
1/2 Cup finely chopped onion.
16 ounces corned beef, (shredded or chopped)
4 cups Swiss cheese ( shredded or sliced )

1 cup mayonnaise
1 cup Thousand Island Dressing
or 1/2 C catsup and 1/2 cup Mayonaisse
1/2 Cup chopped dill pickle slices
1/2 stick butter
2 slices rye bread, chopped in food processor
or
1/2 cup bread crumbs, 1 T caraway seeds

Layer ingredients in a 13 x 9" dish in the order listed.
Mix together the mayo and dressing and pour over.
Melt the butter and stir in the crumbs. Sprinkle over top of the casserole.
Bake in a 375 °F. oven for 30 minutes.