While preparing your sandwiches, you can add more of mustard, cheese, ham, pork, or pickles according to your taste preference. Additionally, you can also add lettuce, tomatoes, salami, mayonnaise, etc. They are not part of the authentic recipe, but there's no harm in innovating. You can serve the sandwich hot or cold, according to your preference. Try dishing out one for yourself, and enjoy your lovely Cuban sandwich!