Preheat the oven to 180 degrees.
Wash and cut the pumpkin. Cut into wedges and scoop out the seeds and insides.
Place the wedges on a baking tray and brush with oil.
Place the pumpkin in the oven and roast for 30 minutes ( adjust according to your oven settings)
Remove the baking trays and let it rest.
When cooled, remove the skin and mash the pumpkin well.
Blend the pumpkin for a smooth puree and the puree is ready.
Serve in airtight container in the refrigerator.