If found this looking through old documents.
A stove made from a mix of sand, soil sand an dung slowly piled up in the corner of a house. I think anthill sand is coarse sand, soil being loamy soil, and dung having fibre binder like mud daub houses.
All natural products, no metal or money required. Get primative but use your head, this likely to work only in hotter/ drier regions. Uses less fuel and produces less smoke.
3 week construction time.