Although typically complex, many rare red-wine blends do conform to certain patterns. Many are regional twists on the classic?Bordeaux Blend; by adding their local signature grape to a basic Cabernet-Merlot blend, many regions have successfully broadened the appeal of their wines while maintaining a degree of regionality. In Italy, this is done with local specialties such as Sangiovese, Montepulciano and even Trentino’s idiosyncratic?Lagrein. In Austria it…