Grass Jelly is a popular dessert and/or drink with Asians, made from the leaves of Mesona Chinensis (in the mint family). The dark brown to black jello-like cubes are not the most attractive option to have, but Chinese people believe in its cooling powers. I used to hate it as a kid and remember my mom trying to force me to eat it in the summer to prevent nose bleeds and other hot weather ailments. It is a slightly bitter and almost medicinal flavor, but often prepared with a syrup or something sweet. I can't explain how I grew to enjoy it but it is indeed refreshing, perfect for a hot summer day.