Combine all ingredients in a blender, and process until smooth.
Wine note: Black beans have a delicious earthy character that tastes wonderful with an earthy Argentinean red wine. The most famous red grape of Argentina is malbec, which was brought to Argentina from the Bordeaux region of France more than a century ago. One tasty favorite that's well priced: Dona Paula Estate Malbec 2005 from Luján de Cuyo, Argentina ($16). -Karen MacNeil