@dadpad,
Yeah, the hollowness gives them their main life, as Halloween decorations (Jack o'lanterns, hollowed out and carved pumpkins):
A candle goes inside and they glow while kids trick-or-treat. Great fun to scoop out the pulp and seeds, preferably with one's bare hands. The seeds can be roasted and eaten, pretty good but I don't love them.
I'd probably prepare pumpkin the same way I prepare butternut squash, though I much prefer the latter. (Cut it into ~ 1-inch cubes, and roast.)
If I cook with pumpkin (pumpkin pie or pumpkin bread, both frequently made for Thanksgiving dinner), I'm more likely to use canned pumpkin: