Wow! Great thread, everybody! Thanks a lot! I'm still slowly getting through it.
My food idea is cous cous. You can get it already with herbs and flavours added, and it doesn't need to cook. All you need is a pot/cup/bowl with cover and some hot water. Pour, stir, cover, you have a hot nutritious meal in 10 minutes.
I do not recommend making it hours earlier, it becomes gross and mushy.
edit: Not for ones with wheat allergies.