- 2 lb fresh pumpkin, cut into roughly 4- by 5-inch wedges
- 1 tablespoon unsalted butter, melted
- Special equipment: cheesecloth
- Preheat oven to 400°F.
- Brush flesh sides of pumpkin wedges with butter. Arrange, flesh side down, in a large roasting pan and cover pan tightly with foil. Bake, turning pieces after 1 hour, until flesh is very tender when pierced with a fork, about 2 hours. Remove foil and cool pumpkin in pan until it can be handled.
- Discard any liquid that may have accumulated and scoop out pumpkin flesh, then purée pulp in batches in a food processor. Transfer to a large sieve or colander lined with several layers of cheesecloth set over a large bowl. Drain purée, chilled, its surface covered with plastic wrap, 8 hours or overnight.