Italian Roast Beef Sliders

package (12 rolls) Hawaiian sweet rolls

sliced sharp provolone

roast beef (from the deli counter), (ask for it to be as rare as possible*)

up to 1 full cup jarred deli-sliced pepperoncini ((found near banana peppers & pickles in grocery store))

unsalted butter, (melted)

dijon mustard

and 1/2 teaspoons poppy seeds

Italian seasoning

dried minced garlic

dried minced onion

Worcestershire sauce