what should be a good indian star tortoise food?

Answer 1

Tortoises generally like to eat lots of fruits and vegetables. You'd also want a water bowl nearby so they can drink. Try not to let them eat spinach.

Answer 2

Try these links for ideas: http://www.tortoisetrust.org/care/celegans.html
http://www.chelonia.org/articles/Geleganscare.htm

Note that this is NOT an easy tortoise to care for outside of India- the habitat requirements are just very tough to provide.