Underground cooking

[Prepaday]

We all know the dangers of cooking outside once the SHTF, Smoke giving our destination away. the smell wafting from the cooking food, Has anyone tried cooking under the soil/turf?
I saw something many years ago on t.v and can't for the life of me remember how the guy did it, I think it was something like this..
Dig a deep hole, lay the bottom with sticks and large stones, set sticks alight and allow to burn until you start to get embers.
Take a crock pot or deep metal tray, fill it with meat/veg cover with foil/twigs , set pot on top of the embers and cover with soil, Leave food to cook for an hour, Dig it up and you have a cooked meal...kinda like an oven..Sorry if I have confused anyone, I'm not 100% sure myself but if anyone knows what I am waffling about please leave a comment on what I'm trying to say...