Watercress Sauce

Ingredients

180 ml watercress
180 ml nonfat yogurt
180 ml mayonnaise
16 ml lemon juice
1 gr tarragon leaves
1 garlic clove
10 ml fish sauce

Instructions

In a blender or food processor, combine watercress, yogurt, mayonnaise, lemon juice, tarragon, and garlic; whirl until smooth. Add fish sauce to taste; whirl to blend. (If sauce is made ahead, cover and chill up to a day.) Makes about 1.5 cups.