These are yummy. I dragged my George Foreman grill out of storage for this one. Stopped by the store on the way home from a trip to the FedEx drop off place and saw they had a sale on roast pork, already sliced. I had this made in my mind before the deli had it bagged for me.
Smear mustard on both sides of a largish sub loaf, layer on ham and pork, some cheese, and sliced dill pickles. This one has provolone. Butter the top and bottom of the buns and have at it. Panini press is perfect, a G. Foreman grill is great. You can also do some “field expedient” improv.