In a pan, add the mango puree and sugar. Stir and cook on medium low heat till it is reduced to half in quantity.
Take a large plate or a plastic sheet. Apply the ghee to grease the plate.
Pour the mango mixture on the plate spread to make a thin layer.
Place this spread in the sun for couple of days or till it dries. I find it gets perfectly dry within a day. Depending upon the amount of sun and heat you get, it will take a day up to four days to dry this mamidi tandra.
Once dry, cut them into your desired shapes and enjoy.