Cut up a box of mandarines( about 25). Be sure to cut small and with skin. Remove pits.Place in a large sauce pot.

Add 1/2 the amount of sugar equivalent to the fruit quantity (add less and taste during the cooking period in case you like it more tart). Cover with water and boil on low heat covered for about 3hrs. Allow to cool and place in jars. 

If you like it more dense, and a couple of sheets of gelatin that were already soaked in cold water or about 2 tablespoons of the powdered gelatin during the cooking period.

To preserve:

Once jared , and sealed tight place jars in a large sauce pot with cloths in between and cover with cold water. Boil on low heat for about 3-4 hours. Shut off fire and allow to cool naturally .