Traditional Reuben Casserole Recipe

Ingredients

• 1.5 cups thousand island dressing
• 1 cup sour cream
• 1 tablespoon minced onion
• 6 slices dark rye bread, cubed
• 6 slices light rye bread, cubed
• 1.5 pounds corn beef, cut into bite-size pieces
• 1 pound sauerkraut, drained
• 2.5 cups shredded Swiss cheese
• 0.25 cup margarine, melted