So you would like to cook your food without having to rely on electricity or gas? This 2300W Portable Solar Cooker has you covered. It is a partial focus solar cooker that can reach temperatures up to 1200C. It has a carbon steel construction with a reflective area of 2.3m2. It weighs only 24kg.
This solar cooler has a focal length of 118cm. You can find out more about it here.