Peel, wash and dice the potatoes and celery. Peel and chop the onion. Melt the fat. Fry the prepared ingredients in it. Deglaze with 1 litre water, bring to the boil. Cover and cook for about 25 minutes.
Then puree, add 100 g cream, bring to the boil briefly. Season to taste with salt, pepper and 2-3 tablespoons of horseradish. Cut salmon into fine strips. Wash the chives and cut into small rolls. Whip the rest of the cream briefly, mix with some horseradish. Serve the soup in portions, each with 1 blob of whipped cream, salmon and chives