Preheat your oven to 400°F (200°C).
Begin by thoroughly draining the liquid from the sauerkraut. A mesh strainer works perfectly, or you can even use paper towels in a pinch.
Lightly grease a casserole dish with butter or a nonstick cooking spray to prevent sticking.
Arrange half of the corned beef evenly in the bottom of the dish. Top it with a layer of sauerkraut and the diced dill pickles.
Next, gently spread half of the Russian dressing over these layers, then sprinkle about one-third of the Swiss cheese.
Repeat the layering process with the remaining corned beef, sauerkraut, pickles, and dressing.
Finish by topping the casserole with the rest of the Swiss cheese, ensuring it covers the top.
Cover the dish snugly with aluminum foil and bake for 10-15 minutes, or until the cheese is wonderfully bubbly.
For a perfect golden finish, remove the foil and broil for an additional 2-3 minutes. Watch carefully to avoid burning!
Serve this delicious casserole hot and enjoy your homemade Reuben feast!