Peel the skin from the tangerines in large pieces. Set aside. Squeeze the juice from the pulp and discard pulp. Set juice aside. Simmer peel in water to cover for 10 to 12 minutes. Drain and cover peel with cold water. Soak overnight.
Drain peel and chop medium fine. In a heavy saucepan, combine peel, reserved juice and sugar. Bring to a boil, reduce heat, and simmer, stirring frequently, for about 25 to 30 minutes or until thick. Spoon into sterilized jars and store in a cool place.
