Peel and core the pears, cut into small pieces and immediately drizzle with the lemon juice. Peel the kiwi and cut into small pieces. Bring everything together with the preserving sugar and the cinnamon stick in a tall saucepan to a frothy boil for several minutes at a high temperature, stirring repeatedly. Don`t forget to stir!
When the preserving sugar has completely dissolved and the jam has a glassy consistency, fill the finished jam full to the brim in the cleaned jam jars. Close tightly and turn upside down for at least 5 minutes. The cinnamon stick is left over!