For a spicier kick, leave the seeds in the jalapeno pepper. If you don't have a smoker, you can slow-cook the pork shoulder in a slow cooker or oven until it's tender enough to shred. Experiment with different types of cheese! Gruyere, provolone, or pepper jack would also be delicious. For extra flavor, add a layer of caramelized onions or pickled onions to the sandwich before grilling.