Hanging on the wall inside Le Veau d’Or, the octogenarian bistro that has been refurbished and reopened by chefs Lee Hanson and Riad Nasr, is a copy of one of the original menus. It lists “Fresh frogs’ legs provençale” as part of the $3.75 prix fixe. When Hanson and Nasr, along with their executive chef, Jeff Teller, and chef de cuisine, Charlie Izenstein, drafted their own updated roster, they knew they wanted a version of the dish but opted for a butter-forward, tart,...