Preparation Blend buttermilk, mayonnaise, lemon juice, Worcestershire sauce, garlic, and salt in a food processor until smooth. Add parsley and pulse until chopped. Add blue cheese and pulse until cheese is incorporated but dressing is still slightly chunky. Transfer to a bowl and stir in chives and pepper. Cooks' note:Dressing keeps, covered and chilled, 1 week.
Preparation Blend buttermilk, mayonnaise, lemon juice, Worcestershire sauce, garlic, and salt in a food processor until smooth. Add parsley and pulse until chopped. Add blue cheese and pulse until cheese is incorporated but dressing is still slightly chunky. Transfer to a bowl and stir in chives and pepper. Cooks' note:Dressing keeps, covered and chilled, 1 week.