Marshall Roll

I believe you are referring to the "Muffaletta" sandwich, which may be what you are calling a "Marshall roll." The Muffaletta is a popular sandwich that originated in New Orleans, Louisiana, in the early 20th century. It is traditionally made with round, sesame-seeded Italian bread that is hollowed out and filled with layers of various meats and cheeses, usually including salami, ham, mortadella, Swiss, and provolone. The sandwich is then topped with a tangy olive salad made from chopped olives, celery, and other seasonings.

The Muffaletta is known for its distinctive flavors and textures, with the salty and savory meats and cheeses balanced by the briny and tangy olive salad. It is often served cold but can also be served warmed. You can find Muffaletta sandwiches in many Italian-American restaurants and delis across the United States.

The name "Muffaletta" comes from the type of bread used for the sandwich, which is called "muffuletta" in Italian. This bread is a round, dome-shaped loaf similar to focaccia. It has a crusty exterior and a soft, airy interior, making it the perfect vessel for the hearty fillings of the Muffaletta sandwich.