Preheat the oven to 350 degrees F.

Slice the Hawaiian rolls in half cutting the top from the bottom. Spread the Dijon mustard on both sides of the rolls. Place the bottom in a 9 x 13-inch baking dish.

Layer the Swiss cheese on the rolls and cover it with the deli ham.

Bake in preheated oven for 10 minutes or until cheese begins to melt.

While sliders are baking, melt butter in a small saucepan over medium heat.

Remove sliders from the oven and brush tops with melted butter.

Slice rolls apart and serve immediately on a platter.