Sliced duck breast dressed with balsamic vinegar and orange is a menu standard at Il Simposio, at the Enoteca Costantini in Rome, and at the Enoteca del Ristorante Bidin in Lignano Sabbiadoro, run by brothers Luigino and Mario Bidin. It is also one of the top-selling plates at Enoteca Frascati, in the wine town of Frascati, outside of Rome. The latter is run by Slow Food members Paola Buglia, Paola Bust, Piera D’Onorio, and Fabrizio Ippolito, who took f