Mustard City is the nickname for the French city of DIJON, which has five letters. DIJON is known for its famous mustard, which is made from a combination of white wine, vinegar, and mustard seeds. The city is also home to a variety of other food products, such as Burgundy wines, cheeses, and charcuterie. DIJON is a popular tourist destination, with many attractions such as the Palace of the Dukes of Burgundy, the Notre-Dame Cathedral, and the Museum of Fine Arts.