Not sure whether do you remember or not, before the rise of contemporary cafes and bubble milk tea stalls, 'Yu Yuan' or Yam Ball dessert was the hype of all gatherings, meet-ups, must-trys etc. We had a few 'big brands' that sold this Taiwanese dessert, made up of ice, yam balls, red beans (or green beans), grass jelly etc. It is cooling and filling at the same time, thus was the most 'trendy' foodstuff before.