Of course you can make a delectable pumpkin pie with fresh pumpkin. Where do you think the canned-pumpkin-puree people got the idea? Let’s show ’em something. Use a ripe “sugar” or “pie” pumpkin to make the fresh puree, not the big, flavorless jack-o’-lantern type. Or visit your farmer’s market and experiment with other varieties of pumpkins or other winter squash that they have to offer.