I'm thinking of things you should be able to find locally, since most of what we use here would be difficult to obtain. I'm thinking of laddoos, dhokla, bati(as in the dahl bati churma of Rajasthan and Gujarat), potatoes(perhaps sookhi aloo?), gajjar halwa, dahl mooth, dried mango, naan(maybe stuffed with cauliflower or potato?), barfi(as Roger suggested), cham cham, etc. Lots of carbs in all of these, plus some fat and protein as a bonus. You are fortunate to be in India when it comes to tasty carbs! No need to go the ascetic route.