Dijon mustard is delicious. It has a nice, tangy flavor that adds a lot of taste to potato salad. However, this is a classic potato salad recipe. And, back in the day, the sweet, yellow mustard is ...

While potatoes are cooking, make dressing: In a medium bowl, mix together mayonnaise, sour cream, buttermilk, mustard, relish, sugar, celery and onion. Season with salt and pepper. Drain potato ...