When life gives you lemons, you make lemonade. When Past You gives Present You leftover Cuban roast pork, first you drink a toast to Past You for the generosity and forethought (a mojito is both thematically and gustatorily appropriate), then you pay it forward by making a Cubano sandwich for Future You.
2 (8- to 10-inch) sections cuban bread, split open horizontally (see note)
4 tbs (60ml) yellow mustard
6 oz (170g) sliced Swiss cheese
6 oz (170g) thinly sliced dill pickles
8 oz (220g) sliced honey ham
6 oz (170g) leftover cuban-style roast pork
4 oz (115g) sliced genoa salami (optional; see note)
2 tbs (25g) butter
2. Butter top and bottom of panini press and press sandwiches with moderate pressure until crisp on both sides, about 8 minutes. If using a cast iron skillet or griddle, melt half of the butter in a pan and add sandwiches. Use a second pan to press on them as the first side crisps. When crisp, flip sandwiches, add remaining butter, swirl to coat, and continue cooking while pressing until crisp on both sides, about 10 minutes total. Slice sandwiches in half diagonally and serve immediately.