What type of cheese is used as the bottom ingredient in an Italian sandwich?

In an Italian sandwich, the traditional choice for the bottom ingredient is Provolone cheese. Provolone is an Italian semi-hard cheese with a mild flavor profile that complements the various meats and other ingredients typically found in an Italian sandwich. Its meltability and subtle taste enhance the overall experience of the sandwich, making it a favorite in Italian deli-style offerings.

While other cheeses like cheddar or American cheese may be used in different types of sandwiches, they do not align with the classic components of an Italian sandwich, which often features flavors characteristic of Italian cuisine. Pizza cheese, typically a blend that includes mozzarella, is primarily associated with pizzas rather than sandwiches. Thus, Provolone stands out as the authentic choice for this kind of dish.