I have seen it served differently, with the sauce poured over the top as well. Made well it is delicious. Made poorly, well.... I remember ordering one in an airport restaurant in Marseille that was so crusty and old I almost cried. You can also typically order the sandwich with a fried egg on top. In that case it is called a Croque Madame. Let us know if you would like to try it that way and we will see if we can accommodate you!