I recalled then that this was something M.F.K. Fisher used to do with tangerines when she was first living in Strasbourg before WWII:
"In the morning, in the soft sultry chamber, sit in the window peeling tangerines, three or four. Peel them gently; do not bruise them...separate each plump little pregnant crescent...Take yesterday's paper (when we were in Strasbourg L'Ami du Peuple was the best, because when it got hot the ink stayed on it) and spread it on the radiator...After you have put the pieces of tangerine on the paper on the hot radiator, it is best to forget about them...On the radiator the sections of tangerines have grown even plumper, hot and full. You carry them to the window, pull it open, and leave them for a few minutes on the packed snow on the sill. They are ready...I cannot tell you why they are so magical. Perhaps it is that little shell, thin as one layer of enamel on a Chinese bowl, that crackles so tinily, so ultimately under your teeth. Or the rush of cold pulp just after it. Or the perfume. I cannot tell."
I cannot give you a recipe, for every room temperature and humidity level is different. In my case, with the smaller clementine segments and a fairly warm and dry room, neither the radiator or the snowy windowsill was necessary. But the forgetting about them for several hours is a must!
Related: Look! Candied Whole Clementines
(Image: Dana Velden)