Dice pumpkin flesh, potatoes, onions and carrots, heat in butter and sweat everything together. Deglaze with white wine, fill up with vegetable stock and cook. Season to taste with fruit vinegar, lemon juice, curry, sugar and cayenne pepper and puree. Refine the whole thing with creme fraiche. Roughly chop the pumpkin seeds, roast them briefly in 1 tablespoon olive oil and garnish the soup with them before serving.
Depending on the taste, the white wine can also be left out. I added the potatoes because the soup tastes better with them.