Slice corned beef into thin, even pieces, about 1/4 inch thick.

Lightly butter slider buns and toast them in a preheated oven at 350°F for 5-7 minutes.

Place a slice of corned beef on the bottom half of each bun, then add a slice of Swiss cheese.

Spoon sauerkraut onto the cheese, balancing flavors and adding crunch.

Cover with the top half of the buns and bake at 350°F for about 10 minutes.

Remove from oven, let cool slightly, cut in half, and serve warm.