I don’t think that I would have ever made this potato salad except for the fact that fingerling potatoes and leeks came in my CSA box the same week that this recipe appeared in Bon Appetit. I just couldn’t resist steering away from my old standby potato salad made with mayo. This is a very light salad and certainly a perfect side dish to any grilled meat that you might choose. I just loved the combination of potatoes and leeks plus white wine vinegar and Dijon mustard. Fingerlings that’s really a funny word for a potato. They are a heritage potato with some of the varieties over a hundred years old. They are not to be confused with new potatoes. Fingerlings are mature potatoes when harvested. These potatoes can be used in the same way as other potatoes grilled, roasted, or in salads.