drizzle with oil and salt and pepper, roast in a hot oven (180- 200 C ish) for at least 20 mins then check to see if cooked...we often do a pumpkin for freezing at the same time as a roast dinner as the oven is already set to hot.
When the pumpkin is cooked, get it out and leave to cool until you can hold the slices.
Remove the skin as it is much easier to get off after the pumpkin has been cooked! I then cut the flesh into chunks, let it cool and open freeze it for bagging up later.
To make soup I add the pumpkin flesh ( either raw or cooked) to sweated onion, garlic in a big pan, add stock, add herbs, bring to boil, simmer for 30 min or longer ( ie, until I remember it!) season to taste, leave to cool, blitz with chopper whizzer thingy,
I then portion it out , freeze some portions and keep some back to eat that night or for lunch...
Mmmm delish!