If a couple of friends were talking about wine and Argentina the conversation would naturally start with Malbec. Juicy, fruity, great on its own, but even better with a grilled steak. It is the country’s star grape, the jewel in its oenological crown. As they continue talking the conversation may move to wine regions. “Mendoza!” one friend cries out. Within 30 seconds the two well informed friends have already spoken about Argentina’s most planted grape variety and its most i