Peel and wash the potatoes and cut them into very thin slices with a cucumber slicer. Heat 1 tablespoon of oil in a pan. Fry the potato slices in it while turning until they are lightly browned.
Then season with salt. Add cream (potatoes should be slightly covered). Cook in the closed pan at medium heat for about 20 minutes. Turn from time to time. In the meantime, wash the fish, dab dry and cut into 8 slices.
Sprinkle with lemon juice and let it steep a little. Dab fish dry and season with salt and pepper. Heat 2 tablespoons of oil in a pan. Fry the fillet on both sides for about 5 minutes. Remove the fish from the pan and arrange on the potatoes.
Garnish with dill and lemon wedges. Cucumber salad tastes good with it.