Season pork with salt and pepper on all sides. Add marinade ingredients to a ziplock bag or a bowl. Add pork and massage meat in marinade to coat. Marinate for at least 1 hour, or up to one day. Remove from fridge 30 minutes before cooking to allow to come to room temperature.

On a grill, in a grill pan or in a skillet over medium high heat, cook pork loin for 7-10 minutes on each side, rotating slowly, until internal temperature reaches 145 degrees F. Remove to a plate, cover and allow to rest for 10 minutes before slicing thinly for sandwiches.

Slice ciabatta rolls or Cuban bread roll in half horizontally. Lightly butter the ousides of the bread. Spread mustard on each inside slice of bread. Layer a slice of cheese, pickles, ham, salt and pepper, pork, then cheese again. Sandwich with top piece of bread.

Cook sandwich in a hot panini press or in a hot skillet, pressing them down with a cast iron or heavy pan on top to toast them into a panini-style sandwich.