Mitraillette
Mitraillette is a Belgian sandwich that is thought to have originated in either Brussels or Wallonia, the country's French-speaking region near the French border. The sandwich is made up of a long baguette stuffed with french fries, fried meat, and some kind of sauce.
Almost every friterie in Belgium has its own version. Meats range from meatballs and steaks to hamburger patties and frikandel, with sauces such as mayonnaise, béarnaise, ketchup, and garlic sauce. Some friteries serve it with carrots, cabbage, caramelized onions, lettuce, and tomatoes, while others serve it plain.
Mitraillette is a popular post-night out snack, and the name means "submachine gun," possibly referring to the baguette as a gun, with the french fries acting as bullets. The sandwich is known as l'américain in northern France, referring to the resemblance between mitraillette and American overstuffed burgers.