These instructions are to build one set of sliders, so use half of each ingredient to make one tray of sliders. (repeat to make the 2nd tray)
Slice the dinner rolls in half. Place the bottom half in the foil pan. Brush with Italian Dressing. Lay out salami in a single layer covering the whole surface, overlapping as needed. Next lay out the slices of mozzarella, followed by a layer of pepperoncini. Next lay out pepperoni in a single layer then fold ham slices in half and layer out to cover the whole surface. Next cover with slices of provolone. Add top of buns.
Repeat building sliders with second tray and remaining ingredients.
Melt butter. Stir in garlic, parsley and grated parmesan. Brush over tops of each set of sliders. Cover with aluminum foil.
Place both trays in smoker and let cook for 2 hours.
Remove from smoker and transfer set of sliders to a cutting board. Let rest for about 5 minutes then use a long knife to separate into individual sliders. Serve 3-4 per person.