Preheat your oven to 400°F (200°C).
Rinse and dry the pumpkin. Cut the pumpkin in a half (or quarters), then cut off the ends. Scoop out the seeds and strings with a spoon.
Place the pumpkin halves (or quarters) cut-side-down on a lightly greased baking sheet or baking dish. Brush the pumpkin with a little bit of oil and bake until the pulp is soft, about 25-50 minutes (depending on the size of your pumpkin).
Remove the skin if needed, then blend the soft pumpkin pulp in a blender until creamy (or use an immersion stick blender).