A francheezie is an all-beef hot dog wrapped in bacon and deep fried, with melted cheddar or american cheese (or velveeta), and originated in chicago. the hot dog is typically split and filled with cheese before being deep fried. alternatively the cheese may be added as a topping after frying. the francheezie is served on a poppy seed bun, either plain or with the toppings of a chicago-style hot dog. it is typically sold by restaurants rather than by street vendors.