I read this post and it reminded me of fireless cookers....they were
more popular in the 19th century and are basically an insulated box.
if you bring the food to a boil for a few minutes and then put it in
the insulated container (a cooler lined with blankets and newspapers
works) then you leave it untouched for a few hours. It continues to
cook nicely. We would do this up in the mountains where we had no
electricity and wanted a hot meal when we returned from hiking.

it reminds me i need to get some more gas for my grill!

j