There appears to be a misconception that there aren't a whole lot of "South Asian" authors out there who write for young people. To try and correct this, here's a list of authors belonging to the South Asian diaspora (so I haven't included Indian authors living in India, for example). I'm sure it's not an exhaustive list... if you're a South Asian author who lives outside your country (expatriates only, please) and has written books that target children or young adults and I haven't listed you, my sincere apologies. Please let me know and I'd be delighted to update this list!
Chitra Banerjee Divakaruni
Tanuja Desai Hidier