Peel and finely dice the shallots. Peel, wash and slice the carrots. Loosen cabbage leaves, wash and cut out the stalk. Tear cabbage into pieces. Drain the pumpkin in a sieve.
Heat oil in a pot and fry shallots until translucent. Steam carrots and cabbage briefly and deglaze with broth. Cover and cook soup at medium heat for 18-20 minutes. In the meantime, roast pumpkin seeds in a pan without fat, remove.
After 15 minutes add the pumpkin to the soup. Garnish the soup with a blob of sour cream and a few drops of pumpkin seed oil.