Each time I visit Nagesh Hegde's place, I get to carry home some rare fruits and at times some rare vegetables. During one of the visits to his place, he gave me this fruit (of which I duly took a photograph as Mom cut it into slices back home) and told me that it is known as the "Passion Fruit". It grows on creepers. Much to my surprise, Mother knew about this fruit. She seems to have come across this earlier and she called it "Sharabath haNNu" (loosely translated to 'the fruit used to prepare a drink'). And she did prepare a drink from it later (which was quite sweet and sour in taste). Like always, I went finding more information about it starting from the Wikipedia page on it. Quite a discovery for me!