4 teaspoons olive or vegetable oil
2 teaspoons cider vinegar
2 teaspoons granular no-calorie sucralose sweetener, e.g., Splenda (r)
1/4 teaspoon dried marjoram
3/4 cup buttermilk
3 tablespoons nonfat plain yogurt
2 tablespoons fat-free mayonnaise
2 tablespoons finely chopped onion
2 tablespoons minced fresh parsley
1 garlic clove, minced