Clean Pumpkin (350 gram) and deseed. Cut to wedges and steam pumpkin with skin on for about 15 minutes or till pumpkin becomes soft.
Remove pumpkin flesh from skin with a spoon. Blend pumpkin until smooth.
Combine blended pumpkin, Yakult (200 milliliter), Lemon Juice (1/2 tablespoon) and Granulated Sugar (2 tablespoon) together in a pot. Stir well and bring to boil. Lower heat and keep stirring the pumpkin mixture for about 20-25 minutes until thickened.
Pour jam into clean jar and allow to cool completely before putting it in the fridge. Serve and enjoy!