To BBQ regardless of a fire ban you need fireless BBQ. For fireless BBQ you need sunpowered BBQ with a big mirror. To make a big mirror lightweight and fit into your backpack you need to make it... INFLATABLE!
Expanding upon NASA experiments, 3 engineering friends invented a highly robust plastic mirror that is inflatable and foldable. Using state of the art technology, they altered the internal structure of the plastic foil, enabling the plastic to "remember" the perfect reflective shape once inflated: it will then reflect the sunlight's Photons onto a focal point. A grill pan/pot is put on top of the focal point and it instantly converts light energy into heat reaching 500F/260C within 5 minutes.
Much more information here: http://www.PhotonGrill.com/
music: Jahzzar_-_7_-_Boulevard_St_Germain freemusicarchive.org
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The PhotonGrill is being designed to be a lightweight parabolic solar cooker. It uses a a mirror...