An Italian Deli Sandwich is a type of sandwich that is made with Italian-style ingredients and served on a panini, which is a type of Italian flatbread. The sandwich typically includes meats such as salami, prosciutto, and mortadella, as well as cheeses like provolone and mozzarella. It is usually served with lettuce, tomatoes, onions, and other vegetables, and may also include condiments such as olive oil, balsamic vinegar, and oregano.