Lots of good ideas on how to cook food if we lose access to electric appliances.
http://www.theprepperjournal.com/2016/12/22/feeding-beast-shtf-disaster-cooking/I note the use of a flexible reflective fabric in a solar oven. This is something that is easily made using the reflective sun shades for auto windows...
Also note the picture of a heavy duty grill over a fire pit. That grill looks very much like a cast iron storm drain cover which I see on many streets... Yes, it is heavy, but it will last a LONG time, not like the light weight wire grills found on barbecues and low price charcoal grills.