Salad dressing fall into two main categories - creamy or vinaigrette. A creamy salad dressing usually uses yogurt, mayo or sour cream whereas a vinaigrette dressing is an oil/vinegar dressing with sometimes additional herbs. I love to make healthy salad dressings both creamy and vinaigrette and even have a dressing with creamy tahini! This healthy Greek yogurt veggie dip can double as a dressing.