Forget the mayonnaise and reach for the olive oil. This version of potato salad is as comfortable in the Dordogne as Dallas. And with the addition of Dijon, tarragon and capers it'll remind you of the delicious iconic French sauce, gribiche.   French Potato Salad Author: Inspired by Jacques Pépin via [url href="http://www.epicurious.com/recipes/food/views/Jacquess-French-Potato-Salad-358334" target="_blank"]Epicurious[/url] Prep