In (southern) France, they make the “americain”, which usually consists of a ca. 30cm Baguette filled with ground/hamburger meat (may vary, there are also versions with merguez sausage or any other meat), tomatoes, lettuce, onion, sauce and fries (yes, they also belong inside the baguette). I like it a lot, even though I would prefer a vegetarian version which I did not find sold yet, but do at home from time to time.