The single-vineyard 2009 Prosecco Zeta is the richest and creamiest of these three sparkling white wines, and also has the highest residual sugar at 20 grams per liter. Round and generous through to the finish, the Zeta lingers on the palate with hints of jasmine and peach. Anticipated maturity: 2010-2011. A Leonardo Lo Cascio Selection, Winebow, Montvale, NJ; tel. (201) 445-0620