And there was I in London envying the tiffin and dabbawala system :-) I thought you had the problem sorted...
Dabbawala system is not available in Bangalore, it is in Mumbai. But Dabbawalas solve a different problem. They are just a well-connected delivery system.
Solving this problem boils down largely to logistics and ensured food quality. Would be great if someone from India starts a Zerocater equivalent.