01 -
Preheat oven to 350°F (175°C). Coat an 11x7-inch or 9x13-inch baking dish with nonstick spray.
02 -
Cut four slices of rye bread into 2-inch cubes and evenly distribute them across the bottom of the prepared baking dish.
03 -
Pulse the remaining two rye bread slices into fine breadcrumbs using a food processor. Set aside.
04 -
Evenly spread drained sauerkraut and chopped dill pickles over the cubed bread. Sprinkle with 1 teaspoon of caraway seeds.
05 -
Distribute 2 cups of shredded Swiss cheese over the sauerkraut and pickles.
06 -
Arrange the sliced pastrami or corned beef over the cheese. Gently press the layers to compact.
07 -
Top with remaining 2 cups of shredded Swiss cheese and sprinkle with the remaining 1 teaspoon of caraway seeds.
08 -
In a medium bowl, whisk together the milk, eggs, creamy dressing, and yellow mustard until thoroughly combined.
09 -
Pour the custard mixture evenly across the prepared layers. Sprinkle the surface with the rye breadcrumb topping. Cover dish with foil.
10 -
Bake covered for 45 minutes. Remove foil and allow casserole to rest for 5 minutes after baking.
11 -
Slice into portions and serve warm.