I put slices of radish to dry out using sugar; rarely I use salt.
How do you do it?
Discussion
The radishes are cut into strips and dried in the sun. In the area where I live, winters are very dry and sunny, so it is possible to dry the radishes without using salt or sugar. 
Oh!
I have never tried those.
I just do it with sugar or salt to dry some of the water and soothe the acidic and bitter taste.
I season it right away for consumption.
I often use your cooking method when making vinegared dishes 😉
The things I dry in the sun become preserved foods. When I use them, I rehydrate in water and cook them 🫕
Dried strips of daikon radish are a traditional Japanese preserved food (though few people make them at home) 🇯🇵🍚