ETA: Thanks so much everyone! especially Sra, anonymous,Bindiya,Vimmi and Latha who pointed me in the right direction! These are cape gooseberries then - also called "rasbhari" locally. I found more about this here
The article said
Also known as physalis, this is a small, smooth round fruit wrapped in its own papery case that resembles a Chinese lantern. The fruit itself is a pretty orange-gold colour and can be unwrapped and eaten as is, or dipped in melted chocolate and served after dinner with coffee. They have a delicate sweet-sour taste - sort of a cross between a gooseberry and a cherry tomato. They make excellent jams, jellies and purées, and can be used in exotic fruit salads, pavlovas or roulades, or simmered in water with a little sugar and used in fruit pies or crumbles.
And now that I found what it was called I found this lovely informative post on Cooks Cottage where she says it is also called "Lucknow ki Pitari" / "Makowi" in North India and "popati" in Marathi and that they have medicinal properties besides being chockfull of pro vitamins! AND best of all she has a recipe for an Upside down cake she made!!! Yaay!
I'm going to try it as soon as I get my hands on some more....she said popping the last of the berries into her mouth as she sat typing this post.