The main ingredient in a traditional Cuban sandwich is roasted pork, which is marinated in a mixture of citrus juice, garlic, and various spices. The sandwich is typically made with Cuban bread, which is a white bread similar to French or Italian bread but slightly sweeter. In addition to the roasted pork, a Cuban sandwich usually includes ham, Swiss cheese, pickles, and mustard. The sandwich is pressed and heated to create a crispy exterior while the contents inside meld together beautifully. It's a staple of Cuban cuisine and a popular dish in many Cuban-American communities.