Preheat oven to 350 degrees. Cover the bottom of the 9x13 pan with foil. Cut each dinner roll in half. Fold the slice roast beef in half and top with sliced cheese. Place them in the pan close together. You may need 2 pans depending on the size of your rolls. My pan fit 12 sandwiches and I used an additional pan for the remaining 4-5 rolls.
Whisk all of the dressing ingredients together. Brush the sauce generously over the top of the rolls, stirring the dressing in between brushing to make sure all flavors and components stay combined. Allow to sit at room temperature for 10 minutes. Bake in the oven for 12-15 minutes until cheese is melted and the tops are slightly crispy.
Recipe by Kitchen Belleicious at https://kitchenbelleicious.com/2014/09/02/roast-beef-and-pepper-jack-sliders/