Peel and wash the potatoes and cook in salted water for about 20 minutes
Trout wash. Boil up wine, 1/2 l water, vinegar, spices and some salt. Cover the trouts and let them simmer for about 15 minutes at low heat. Do not boil any more!
Clean or peel and wash leeks and carrots and cut into fine strips. Heat 1 tablespoon of fat. Steam leek and carrots for 5-8 minutes. Season with salt and pepper
Lift out the fish and keep it warm. Sieve the stock and measure out a good 1/4 l. Heat 1 tbsp. fat, sweat flour in it. Stir in the stock, bring to the boil and simmer for another 5 minutes. Stir in horseradish and season with salt and pepper. Arrange everything. Garnish with salad, lemon and dill if desired.