Preheat oven to 356F (180C) and line a baking sheet with parchment paper.
Wash and pat dry the pumpkin.
Cut into thin wedges (2-3 inches), remove seeds and skin (this is optional, you can roast it with the skin and remove later if you find this is easier).
Brush the wedges with olive oil and place them on the prepared baking sheet. If you chooseto leave the skin on leave the skin side down.
Roast for about 40 minutes until very soft (poke with a fork to test before removing from oven).
Remove from oven, let it cool a bit and place in a blender or food processor to make asmooth pure (if you roasted with skin on, use a spoon to scoop the pumpkin anddiscard the skin. If you prefer you can also mash with a fork until smooth. Youmay need to scrape the sides of your blender a few times and blend for about 1minute.