While green goddess is traditionally made with chervil, chives, or tarragon, sorrel is an excellent stand-in. The verdant herb adds a distinctive tart, tangy flavor to the creamy dressing. Serve alongside Whole Coal-Roasted Vegetables or Grilled Whole Fish with Lemon and Thyme.
Combine anchovies, mayonnaise, sour cream, buttermilk, 1/2 teaspoon salt, and 1/4 teaspoon pepper in a food processor; puree until smooth. Transfer to a bowl; stir in chopped sorrel. Garnish with sorrel leaves to serve. Dressing can be refrigerated in an airtight container (without garnish) up to 3 days.