Blend the blue cheese and the sour cream and place in a shallow bowl (if the blue cheese is either too thin or dry to stick to grapes, adjust sour cream and cheese amounts accordingly). In a mini-chop or food processor, coarsely chop nuts. Place nuts in a separate shallow bowl. Roll grapes in blue cheese mixture, then roll grapes in nuts. Serve with toothpicks.
Recipe Courtesy of Curtis Aikens