What you need
1/2 cup each mayonnaise
1/2 cup sour cream
1/2 cup fresh parsley
The juice of 1/2 lemon
2 chopped scallions
3 tablespoons chopped tarragon
3 anchovies
Season with salt and pepper.
Instructions
Blend 1/2 cup each mayonnaise, sour cream and fresh parsley, the juice of 1/2 lemon, 2 chopped scallions, 3 tablespoons chopped tarragon and 3 anchovies in a blender until smooth. Season with salt and pepper.