Cut the pumpkin into slices, remove seeds, peel and cut into pieces. Peel, wash and chop the potatoes. Onions peel and chop.
Heat the oil. Sauté onions in it. Sweat curry briefly with. Add pumpkin and potatoes, fry briefly. Stir in 2 l water and stock, bring to the boil. Simmer covered for about 30 minutes.
Finely puree the soup and refine with cream. Season with orange juice, salt, pepper and 1 pinch of sugar. Arrange the soup and sprinkle with pumpkin seed oil. Garnish with basil.