Turn off the oven, allow the pumpkin to cool for an hour, then place it in your cold garage (loosely covered with wrap or foil) or your refrigerator and allow the custard to set 6 hours or overnight. When ready to serve, scoop out custard into small dishes (you can scrape the sides a bit as you scoop it out if you choose to scrape off some of the cooked pumpkin for additional flavor, I am sure the Pilgrims wasted nothing).