Ingredients

3 anchovy fillets packed in oil 

3/4 cup mayonnaise 

1/2 cup sour cream or creme fraiche 

1/2 cup buttermilk 

Kosher salt and freshly ground pepper 

2 1/2 cups lightly packed sorrel leaves, finely chopped, plus whole leaves for serving (optional) 

Preparation

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.