Allow 10-14 days for your pumpkins to cure properly in a warm, relatively humid environment with plenty of airflow. Curing will harden the rind and concentrate the sugars in the flesh. A fully cured pumpkin will resist the pressure of your fingernail, the stem will be dry and rigid, and the pumpkin will make a hollow sound when thumped.
Preheat the oven to 350°F.
Take your properly cured pie pumpkin and remove the stem by carefully banging it on the edge of the counter.
Pierce the pumpkin with a sharp knife.
Place pumpkin on a cookie sheet lined with a silpat mat, parchment paper, or lightly sprayed with oil.
Cook the pumpkin for 20 minutes, or until you can easily pierce the pumpkin with a fork.
Remove pumpkin and allow to cool slightly.
Peel the skin away from the pumpkin.
Remove the seeds and other stringy bits from the center of the pumpkin.
Use puree as is or blend until a smooth consistency is reached (in a blender, a stand mixer or with a stick blender).