Wash the pumpkin thoroughly, remove the skin and seeds, and dice it.
Cut the onion and carrot into pieces of similar size.
Heat olive oil in a pan and sauté the onion, carrot, and pumpkin.
Add enough water to cover the ingredients.
Simmer over medium-low heat until the pumpkin becomes tender.
Put the ingredients into a blender and blend until smooth.
Season with salt and pepper, then reheat once more.