Here is an oven that lets you use sunlight to cook your meals. The SUNBOX 250 Solar Oven cooks meals in 20 minutes. It can reach temperatures up to 250C. It is portable, so you can take it with you to the beach or anywhere else.
The SUNBOX 250 can be used to make fish, meat, vegetables, and even cakes. It can cook food for up to 4 people. Its vacuum tube keeps the heat during cloudy periods. The device weighs only 6.5 kg. More information is available here.