I have frozen thin slices of uncookded pumpkin after I have blanched them for a minute in boiling water, then refreshed them in iced water.
The slices were the thickness of the diameter of a standard lead pencil.
I used the slices in a chickpea and pumpkin curry. They went a bit mushy around the edges but the pumpkin was great in the curry. I just partly thrawed them and then threw them into the chickpeas along with the curry paste.
I do freeze a lot of pumpkin that has been cooked and mashed.
Have you even cooked pumpkin in a beef stew? I have and frozen the left overs..the pumpkin retains it's texture and shape just like the other vegetables in the stew. So I don't think you should have too much trouble freezing pumpkin. But you have my wondering now.. so we have just just blanched and refreshed chunks of pumpkin and put it in the freezer. I will thraw it out over the weekend to see if it works ok.
Thanks for bringing this up.
