Aka : Singhara or Panifal or Water caltrop
Crispy n crunchy fruit, delicate sweet coconut like flavour, weird shape and off-taste but once you know about its benefit you will be able to push it aside.
Chinese herbs can be good medicine for your health. I actually love these things.
They're called "Water caltrops" or "Buffalo chestnuts". Delicious depends on how hard to crack and take out a whole. Lol Wanna try one?