On a rimmed bake sheet, lay out the sub rolls cut side up. Layer in each roll: 2 slices mozzarella, pulled peperoncini pork, and 2 slices provolone. Put under the broiler for a couple minutes just until cheese is melty and lightly golden around the edges. Yields 4 servings.
Hoagie spread is found with the condiments in the grocery store. Mine is the same brand as the peppers and assorted olives, relishes, and such. It is really spicy and I have kids, so I only added 1 tablespoon (and they LOVED these subs). BUT if it were just adults, I would add 2 tablespoons HUZZAH.
So I cooked the pork with peperoncini but used banana pepper rings at the end? Well, I had a jar of already sliced banana pepper rings, and since I made this on a weeknight, it was just easier to do that at that point. And I was out of peperoncini peppers anyway by then. Peperoncini and banana peppers are very close in flavor, so just do what you like ....either/or.