Wine Mustard With Grapes

In the region called the Corrèze, I tasted a wonderful whole-grain black mustard, which looked like caviar. This particular mustard was an old recipe from the fourteenth century that somehow got lost in time, but in the past thirty years the Denoix family, who produce great walnut products, brought it back into the marketplace. The condiment is made from black grapes cooked, strained, and left to form a must that is then mixed with mustard powder.