TLK how long were they away for? i went pakistan a few months ago for 2 weeks, and i missed orange juice, also really missed english foods, was sick of desi foods by the end of my time there lol.
but after the flight home i felt really bloated from having eaten the plane food and then just sat in my seat doing nothing, so its possible they will all want something really light. unless the journey home from the airport is gonna be a long one,then perhaps theyll want a full meal lol.
personally i wanted mashed potato and fish cakes lol, something i couldnt find in pakistan, not sure you can find it in india,or at least,it doesnt taste the same anyway.
good luck, am sure your family will be happy with whatever effort you make :)