I first saw this on Dirt Girl where she left a pizza in the solar cooker at the start of the day and settled down to a nice warm meal at the end of the day. This cute eco-friendly concept is already used in refugee camps.
The pot of food is left in the solar cooker and heated with only solar energy on a clear sunny day without the use of fuel. It doesn't catch fire so it doesn't need to be watched and kids can run around it safely. Making it ideal for camping or temporary living in areas with no infrastructure.