This creamy mixture dresses cold seafood as well as green salads.

1 c. Hellmann's Best Foods Real Mayonnaise
1/2 c. parsley sprigs
2 green onions, cut up
2 tbsp. tarragon vinegar
2 tsp. sugar
1/4 tsp. salt
1/4 tsp. dry mustard
1/8 tsp. garlic powder
1/8 tsp. pepper
1/2 c. plain yogurt

Place first 9 ingredients in blender container; cover. Blend until smooth. Fold in yogurt. Cover; chill. Makes 1 1/2 cups.