Here are some tips for freezing and using pumpkin.
Pumpkin can be peeled cut in cubes and blanched in water, cooled and packed in ziplock bags to freeze.
You can make pumpkin soup, packed in containers. When you want to eat, thaw and microwave or heat on stove and eat.
For roasts, pierce with a knife and put in a pot of boiling water and let it cook for few minutes and cool. When you want to use, cut and add to your roast and heat.
You can cut in cubes, steam and sprinkle with brown sugar and eat. You can use in potjie*, in stew or even in vegetable curries.