The perfect easy party food to feed a group: Roast beef sliders.
Preheat the oven to 350. Place into a greased 9x13 pan making room for 12 sliders.
Cut all the rolls in half and add one piece of roast beef folded in half and one piece of Swiss cheese into each roll.
Melt the butter. Mix all the sauce ingredients together. Brush the sauce mixture onto the tops of the rolls.
Cover pans with tinfoil and bake at 350 for 30 minutes. Serve warm.
The sauce makes enough for 2 pans (24 sandwiches).