Prosecco is officially the toast of the town. Prosecco recently beat out Champagne as the most popular sparkling wine in the world. There is no better time like the present to get to the bottom of the Italian bubbly. Wine Oh TVs Monique Soltani headed to San Franciscos hidden hotspot Mariannes at The Cavalier to sit down with Fabrizio Gatto, the winemaker for La Marca the number one selling prosecco in the United States.