It can’t be Champagne unless the bubbly is bottled in that French region.
Sweet onions can’t be called Vidalias unless they are from that specific area in Georgia.
True New Mexico green chiles can’t be called that unless they are grown in Hatch, NM.
So, Dijon mustard must be the same—it can’t be true Dijon unless . . . → Read More: Homemade Whole-Grain Dijon Mustard