Gretchen Thomas is the Wine & Spirits Director for the Barcelona/Bartaco Restaurant Group.I firmly believe the single most important product that Spain has to offer to the world is Sherry. Well, soccer fans may disagree, but I stand by my opinion. If Sherry wines were a world famous rock band, I have been the equivalent of a road groupie for the past 6 years…always a fan, love to partake, but having never penetrated to the source of the art (i.e. I’d never been Jerez!). Not until last year anyways. After more than twenty wine excursions to Spain in the past 7 years, I finally made my way to the deep south of Spain and visited Jerez, aka Sherry territory.