Cut the papaya into two, remove the seeds and take out the soft flesh with a spoon. Grind it well and strain out the pulp.
Boil the papaya pulp in an aluminium or steel vessel. Stir it continuously with a wooden ladle. When it boils add the sugar slowly into it. Boil it well by stirring continuously. To test whether the jam is done, pour some jam on a dry plate. Allow it to cool and tilt the plate. If the jam is ready, it will fall in flakes. When the jam is done, add the citric acid to it (if needed add the essence) and remove from the fire and pour it to a bottle. When the jam gets cool, close the mouth of the bottle.