This is not a new technique is as old as earth.
Using the sun to dry fruits or vegetables is a very good way to preserve them for winter.
This time I'm drying some tomatoes, because it's a vegetable we don't have in winter and we miss so much.
Tomatoes this way can be used in many forms, salads (they have intense flavour), pizzas (so good matching with cheese), salsas, etc.
Here you have the video: https://youtu.be/bMuAsVaCi5w
First we need to clean very well the tomatoes, to be sure there is no sand on them and no bacterias left.
After that, I cut them in two (four if it's too big) parts.
Then I put them in my self-built "dehidrator machine" (How to build it: http://sustainablelivingdiy.blogspot.com.es/2015/08/how-to-build-solar-dryer.html),
that you can see is easy to make and prevent the attack of flyes, mosquitoes, ants, etc... Also it concentrates the sun with poplipropilene on top.
After 2 weeks, with a lot of sun, you took them out and can store them on glass jars or as I did in vacuum bags.
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