Here's the easiest way ever to cook a whole pumpkin with no chopping involved!
Place a small enough pumpkin to fit your slow cooker and set on low for 6-7 hours. Note I haven't added any water here. (My slow cooker is roughly 6.5 litres)
Once cooked, leave to cool and slice in half.
Scoop out the guts and discard if not using as a roasted snack. Then scoop out all the good flesh to keep. Throw any of the skin behind. It's that simple!