Cut the pumpkin into small cubes and place in a saucepan. Add sugar and mix thoroughly.
Put the pot on medium heat. When the sugar is melted, increase the flame and, while constantly stirring, bring the jam to a boil. Then cool completely.
Repeat the cooking 2–3 times more depending on the desired density of the jam. During the last cooking add cinnamon and citric acid to the jam.
