Ingredients

• 1/3 cup fresh flat-leaf parsley
• 1/3 cup Gorgonzola dolce or other soft blue cheese
• 1/3 cup sour cream
• 1/3 cup mayonnaise
• 1/3 cup well-shaken buttermilk
• 1 tablespoon distilled white vinegar
• 3/4 teaspoon salt
• 1/4 teaspoon black pepper
• 1/4 cup finely chopped fresh chives
• 1/2 head romaine, thinly sliced crosswise (5 cups)
• 1 small head radicchio, quartered and thinly sliced lengthwise (3 cups)
• 1 small head frisée, torn into bite-size pieces (3 cups)
• 2 Belgian endives, trimmed and thinly sliced lengthwise

Instructions

1. Blend parsley, cheese, sour cream, and mayonnaise in a food processor until smooth. Blend in buttermilk, vinegar, salt, and pepper. Transfer to a bowl and stir in chives.
2. Toss lettuces together in a large bowl, then toss with a generous 1/2 cup dressing.