Chez Jenny is a culinary institution on the Place Republique.  A classic brasserie that's been around since the 1920s.  We pass by all the time since Republique is our nearest metro stop.  Finally had dinner there the other night and were treated to the best onion soup I've ever had.  It's mostly about melted cheese!  Chez Jenny is a real meat lover's place -- sausage and sour kraut are the mainstays.