01 -
Preheat oven to 350°F. Line baking sheet with foil and spray with cooking spray.
02 -
Cut entire slab of rolls horizontally to create two even layers.
03 -
Place bottom layer on baking sheet. Layer 12 ham slices, cheese slices, remaining ham, then top layer of rolls.
04 -
Whisk together melted butter, mustard, poppy seeds, Worcestershire sauce, and onion powder. Brush over rolls and let sit 5 minutes.
05 -
Cover with foil and bake 18 minutes. Uncover and bake 5-6 minutes more until golden brown.