Has anyone ever made a pumpkin pie out of a pumpkin?

I mean, by not using pumpkin pie filling. I live in Sweden, and we have pumpkins, but not canned pumpkin. Has anyone ever made a pie by cutting up the actual pumpkin, boiling it down, and then making it into a pie? Can I use the same pumpkin for a jack o lantern, or do I need to buy two?