If you've never read this article, you don't know what you're missing.
Try this as an experiment one evening and see how cheaply you can eat at work. I did it once for about 8 weeks and I figure I saved $2000.00 I would have spent on lunch.
Imagine the same principles applied inside a shelter for food preparation and cooking as the last word in energy efficiency. I tried it during one of my R&D nights in Firehold Alpha and the most important thing I realized after discovering what an amazingly easy principle it was is that you need to have a really, really good way to exhaust the steam when you open your fireless cooker "crockpot." Otherwise it's the most incredible thing since sliced bread.