Banh day (pronounced yầy) is a very simple and traditional rice cake with a great story. Vietnamese legend has it that the wise King Hung Vuong the VI had a competition to decide which one of his 22 sons was going to succeed him on the throne. The competition was to find the most tasty dish in the country and serve it to the King during the last day of the lunar month. The person with the tastiest dish would inherit the throne (Top Chef eat your heart out). So each prince went off and scoured the land and seas in search of rare delicacies to make that perfect dish. The exception was one prince name Lang Lieu (Tiet Lieu).