Wash the pumpkin, quarter it, remove the seeds and roughly dice with the skin. Peel, wash and chop the potatoes. Peel and chop onion. Heat 1 tablespoon of oil in a large pot. Brown the onions in it. Sprinkle with curry and sauté briefly.
Add pumpkin and potatoes. Add apple juice and 3⁄4 l water. Stir in stock. Bring to the boil, cover and cook for about 30 minutes.
For the pesto, roast almonds in a pan without fat, remove and let cool. Wash parsley and shake dry, chop finely. Chop the almonds finely as well. Mix with parsley, lemon juice and 4 tablespoons of oil.
Season to taste with salt and pepper.
Puree the soup with a hand blender. Season to taste with salt and pepper. Serve with crème fraîche and pesto.