01 -
Preheat oven to 350°F (175°C).
02 -
In a small bowl, whisk together mayonnaise, ketchup, grated onion, sweet pickle relish, and smoked paprika to create Thousand Island dressing.
03 -
Spray a 9×13-inch casserole dish with nonstick spray.
04 -
Layer rye bread cubes evenly in the casserole dish.
05 -
Add chopped corned beef over the bread layer.
06 -
Drizzle Thousand Island dressing evenly over the corned beef layer.
07 -
Top with a layer of well-drained sauerkraut.
08 -
Sprinkle shredded Swiss cheese evenly on top.
09 -
Bake uncovered for 25 minutes or until cheese is bubbly and golden.
10 -
Let the casserole cool slightly before slicing and serving.