Cinq Mars
This quaint, casual bistro a few blocks from the Musée d'Orsay is open seven days a week and serves its own scrumptious versions of the deeply satisfying French classics like a country terrine, brandade de morue (a garlicky, salty cod and mashed potato dish) and blanquette de veau (a delicious, creamy veal dish). Desserts are also traditionally French and all delicious, especially the profiteroles (vanilla ice cream in a puff pastry with warm chocolate sauce) and the giant dollop of chocolate mousse.