Momordic cochinchinnensis or Wonder fruit or Gac

Momordic cochinchinnensis or Wonder fruit or Gac, a photo by thomaswanhoff on Flickr.

From Wikipedia: Momordica cochinchinensis is a Southeast Asian fruit found throughout the region from Southern China to Northeastern Australia.It is commonly known as gac, from the Vietnamese gấc (pronounced [ʒə́k]) or quả gấc (quả meaning "fruit"). It is known as mùbiēguǒ (木鳖果) in Chinese, and variously as Baby Jackfruit, Spiny Bitter Gourd, Sweet Gourd, or Cochinchin Gourd in English. The fruit contains by far the highest content of beta-carotene of any known fruit or vegetable.