I recently learned that the Grey Poupon Dijon Mustard we have here in the US is actually produced from mustard seed grown in Canada. So while in Dijon, France I suggest you spend a morning (or two) walking your way through the Dijon Covered Food Market and find local farmers and producers still selling the authentic Dijon mustard from Dijon. All types of "moutardes" are available in all levels of hotness. Sampling is encouraged. Within the covered food market you will also find a cornucopia of local vendors selling their specialties - local cheeses, breads, pastries, meats, produce and of course, a wine bad for when you get thirsty. Plan to have lunch there after shopping all the stalls.