Coffee Roast by Sunlight

Tije de Jong, a coffee lover based in Amsterdam,  wondered if it would be possible or even easy to roast with sunlight and a magnifying glass.

As a boy he was successful at setting stuff on fire with his magnifying glass, so there might be enough solar energy to collect in a metal, reflective bowl catching the full blast of solar heat on a handful of coffee beans.

Shall we see the output of the trial?

Coffee Roast by Sunlight from Frans Goddijn on Vimeo.