Preheat your oven to 350°F.
Line a 9-inch square baking pan with aluminum foil and set it aside.
Slice the entire block of attached dinner rolls in half horizontally, keeping the sides intact.
Place the bottom halves into the prepared baking pan.
Layer the sliced ham evenly on the bottom halves of the rolls.
Follow with a layer of sliced cheese on top of the ham.
Place the top halves of the rolls over the cheese layer.
In a small bowl, mix the melted butter, mustard, Worcestershire sauce, poppy seeds, onion powder, and garlic powder.
Pour the butter mixture evenly over the assembled sliders.
Cover the entire pan with foil and bake for 15 minutes.
Uncover and bake for an additional 5 minutes to lightly toast the tops of the rolls.