ParabolicTrough

http://boingboing.net/2009/04/13/7-solar-oven-design.html

http://www.cnn.com/2009/TECH/04/09/solar.oven.global.warming/index.html Bohmer's contest win notwithstanding, solar cooking with a cardboard oven isn't new. Two American women, Barbara Kerr and Sherry Cole, were the solar box cooker's first serious promoters in the 1970s. They and others joined forces to create the non-profit Solar Cookers International -- originally called Solar Box Cookers International -- in 1987.

http://www.medwelljournals.com/fulltext/jft/2009/12-19.pdf Journal paper

mirror designs
http://solarcooking.wikia.com/wiki/Helios_Array

http://www.solarfire.org/tech/helios/helios.html Best idea yet