The answer: Kiwano Melon
This spiny looking fruit is native to Africa and is a member of the cucumber family. You can eat the inside of the fruit, which is bright green and has a jelly-like texture with soft seeds. The mild flavor of Kiwano can be compared to cucumber or lemon with a hint of banana. You can use it in salads, stir it into yogurt, or make it into smoothies or juices. It is rich in antioxidants, including vitamin A, and is low in calories.