I'm in Paris for only two more days and have not been able to find a sandwich I loved when I was here last ten years ago. I thought I had them in Paris, too, but it may only have been in Marseille or Nice, where it was street food. The sandwich was a steak hache frites, chopped hamburger in a baguette topped with French fries. I've not been successful searching this board or google. I'm staying in the 11th arr., but will take the metro anywhere to find this.