Two potato gratin with Maille Mustard! I think we can all agree that the sides are just as, if not more important than the entrée of any holiday gathering. #ad Everyone has their favorites and looks forward to them all year. Create a new tradition with this Two-Potato Gratin with Maille Mustard. mailleus This two-Potato Gratin with Maille Mustard combines the classic russet potato with the festive addition of sweet potatoes. All gratins start with a luscious sauce and this one deserves center stage at your holiday gathering with the addition of Maille Dijon Mustard and Maille Old Style Mustard. The Dijon adds a bright tang that elevates the rich sauce while the whole grain mustard seeds in the Old-Style Mustard offer up texture and their own layer of flavor. The first bite of this gratin offers up a true taste of France. Since 1747 Maille has set the standard for premium mustard. By simply adding a spoonful of Maille you will elevate your dish to the next level. By using a good quality...