When it comes to cabernet franc, Roanoke Vineyards is the rare Long Island producer that can be counted on — almost without fail — from year to year. Cabernet franc can be tricky. If it doesn’t get ripe enough, it can taste like green bell pepper. Too ripe and it loses varietal character. It can be a fine line to toe, but owner and vineyard manager Richie Pisacno deftly walks it. And winemaker Roman Roth carries it through in the cellar. Roanoke Vineyards 2009 Cabernet Franc ($34) delivers aromas of dark-roast coffee, roasted nuts, blackberry, black cherry and cola. On…