This is a deliciously creamy yet low-fat potato salad. The french dressing plus the mayo and yogurt adds some tang and colour to the salad. I have never felt the need to add any salt to this recipe. Plan ahead, this salad needs 2x4 hours chill time. NOTE: If you choose to use the whole eggs instead of egg whites the fat content of this salad will increase. It is also nice to use the 3 or 4 egg whites and then use one sliced whole egg as a decorative topping.