This solar oven has the ability to cook four portions ... this BioLite EcoZoom Versa stove runs off flammable materials that are easily found at a campsite, like wood, twigs and dried leaves.

but we have had a more conventional solar oven or two. This dish-based solution would probably benefit from a sun tracker.

The exact process varies by design but all solar ovens usually require highly reflective materials, for example, aluminium foil or glass, which she has used for her oven. "They should both be set ...