For the cucumber potatoes, cook the potatoes in steam and peel them. Prepare a light preserves from fat and flour, add finely chopped onion and let it sauté a little.
When this has turned a little color, add parsley and dill and let it foam up. Extinguish with soup, add salt and pepper and let it boil away a little.
Cut the peeled potatoes and cucumbers into thin slices, put them into the sauce, add the sour cream and let it bubble up briefly.