3/4 cup low-fat plain yogurt
1/4 cup low-fat mayonnaise
1 tablespoon grated Parmesan cheese
1 tablespoon minced green onion
1 1/2 teaspoons freshly ground black pepper
1 1/2 teaspoons cider vinegar
1 teaspoon lemon juice
1/2 teaspoon Worcestershire sauce

Combine all ingredients in a bowl.
Stir with a wire whisk until smooth.
cover; chill thoroughly.

Stir well before serving over salad greens.

6 servings