A submarine sandwich, commonly known as a sub, or a hoagie (Mid-Atlantic and Western Pennsylvania), hero (New York City), Italian sandwich (Maine), or grinder (New England), is a type of cold or hot sandwich made from a cylindrical bread roll split lengthwise and filled with meats, cheeses, vegetables, and condiments.
The Italian sandwich originated in several different Italian American communities in the Northeast from the late 19th to mid-20th centuries. The popularity of this Italian-American cuisine has grown from its origins in Connecticut, Pennsylvania, Delaware, Maryland, New York, New Jersey, Massachusetts, and Rhode Island to most parts of the U.S. and Canada, and with the advent of chain restaurants, is now available in many parts of the world.
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The Daily Omnivore 