Peel and finely chop the onion. Peel, wash and slice the carrots. Drain pumpkin. Heat the fat. Steam onion and carrots for about 5 minutes.
Add vegetable stock and pumpkin, simmer for 5 minutes. Puree with a chopping stick, leaving some of the vegetables chunky. Season to taste with salt, pepper and orange juice. Roast sunflower seeds in a pan without fat while turning and sprinkle over them. Serve garnished with parsley