Clean the leek, wash it and cut it into rings. Peel, wash and roughly chop the carrots and Jerusalem artichokes
Heat the fat in a large pan. Fry the vegetables in it for about 10 minutes, turning them more often. Season. Stir in 3/8 l water and stock, bring to the boil. Simmer covered for 10 minutes
Wash and chop the herbs. Mix with crème fraîche. Roast the seeds until golden brown. Flavour vegetables again. Sprinkle with seeds. Add the crème fraiche