Top your fries? As in ladled over top? Ack. Each frite must be annointed individually, face to face. With of course fresh mayo (wasabi, curry, chipotle, roasted red pepper puree, ground and toasted mustard seeds or whatever variants thereof). Ketchup would be The Devil's choice only if he were going to serve it to someone else. Otherwise, you're damning yourself to bad frites by yourself. Not that there's anything wrong with that. But you shouldn't be allowed to vote or drive.