I'll bet this is an easy question for those who know Paris better than I:
I just returned from a short trip to Paris. While there, I constantly had my eye peeled for a cafe serving Salade Lyonnaise among the salades composees. Mostly I was absolutely dying for a salad with frisee, since it looked so incredible at all the markets. But also the lyonnaise has a poached egg and lardons, and that doesn't hurt either. I didn't spot this dish on the menu during my short trip. Where can you get a good, run of the mill salade lyonnaise? Nothing gourmet, more cafe/brasserie/creperie style environs.
I'm looking for the more central area (ideally 5th or 6th), since I'm a mere tourist and rarely occasion to visit the outer arrondissements.