Wash the pumpkin thoroughly, remove the skin and seeds, then cut into small pieces.
Peel and finely chop the onion and carrot as well.
Melt butter in a pan and sauté the onion and carrot.
Add the pumpkin pieces and stir-fry together.
Pour in water or vegetable stock and boil until the ingredients are cooked through.
Once the ingredients are soft, blend smoothly with a hand blender or mixer.
Add milk or fresh cream and bring to a gentle boil again.
Season with salt and pepper, then serve in a bowl.