To make this recipe gluten free, use a certified gluten-free sandwich roll or gluten-free bread with a sturdy crust, since traditional Cuban bread and most hoagie rolls contain gluten. You should also verify that the ham, roast pork, mustard, pickles, and cooking spray are labeled gluten free, as some brands may include additives or flavorings that contain gluten. If cross-contact is a concern, prepare the sandwich in a clean skillet or sandwich press that has not been used for regular bread products. Once the bread is swapped, the rest of the ingredients are generally easy to adapt.