No picnic would be complete without potato salad, but sometimes this dish can be filled with unnecessary calories and mayonnaise overload. This healthier version of a summertime staple uses Dijon mustard and garlic salt for flavor, and Greek yogurt replaces mayonnaise to cut calories and add nutrition. It's easy to prepare and can be stored in the fridge until your guests are hungry. Each serving has just 127 calories, making it a great choice for any indoor or outdoor gathering.