This is a badge bit (BB) that is part of the 
PEP curriculum.  Completing this BB is part of getting the sand badge in 
Food Prep and Preservation
 
 To complete this badge bit, you must cook at least 2 cups of grain in a solar oven.  (Note that this BB is part of a 4 part adventure in cooking grain in four different ways. Pseudograins are also allowed, but all four ways of cooking must be the same food prepared with 4 different cooking contraptions.)  
 
 Here are some solar ovens threads at permies:
   - 
Making non-toxic cheap solar ovens
   - 
Review of the Sun Oven
   - 
Review of the Solavore Sport
 
 There are 
many types of solar ovens you could make yourself. 
 Here is an even bigger array of 
plans for do-it-yourself solar ovens.
 
 This is an article and infographic by GoSun on 
types of solar ovens:
 
 
 
 This is an overview of a few of the types of solar ovens out there:
 
             
                
            
 
 This is a basic how to of using a solar oven:
 
             
                
            
 
 Cooking Rice with a Solar Oven
 
             
                
            
 
 To complete this BB, the minimum requirements are:
    - you must produce at least two cups of grain
    - you must use a solar oven
 
 To show you've completed this Badge Bit, you must provide:
     - a picture of your grain cooking in a solar oven
     - a picture showing your cooked grain that is obviously at least two cups
 
 Clarifications:
  - All food prep and preservation BBs strictly prohibit plastic, teflon or aluminum touching the food at any point