"Taking different factors into consideration, we managed to build a simple – although a bit time-consuming – and cheap solar kitchen using an umbrella, cardboard, PVC pipes, and aluminium tape, among other materials, so it would be economically accessible to most, and an efficient solution to both the lack of cooking artefacts and the lethal side-effects that coal-powered ovens can bring."
For the steps involved in making this, head to www.instructables.com/id/Solar-Kitchen-english-Version/