The only special ingredient in a Cuban Sandwich is the Cuban bread and you can usually find it in most grocery store bakery sections. Cuban bread is a long loaf of bread, similar to a baguette, that is crispy on the outside but with some give (unlike a baguette or ciabatta). The inside is tender and fluffy with texture. If you can't find Cuban bread, swap in a Bolillo roll, hoagie roll, or soft French bread loaf that has a crisp crust.