Preheat the oven to 350°F and spray a 9x13-inch baking dish with nonstick cooking spray.
Split your rolls in half. Place the bottom halves in the prepared baking dish.
Top the buns with 6 slices of Swiss cheese, follow with corned beef, sauerkraut, dressing, more corned beef and then a second layer of 6 slices of Swiss cheese.
Place the top halves of the buns on top.
In a small bowl, mix together the buttered topping ingredients.
Brush the top of the rolls with the melted butter mixture.
Cover the dish with tinfoil and bake for 20 minutes, or until the cheese is hot and bubbly.
Remove foil, and bake for an additional 5 minutes (or until the tops of the sliders turn a golden brown).
Remove from oven, slice and serve.