Cut the potatoes into round slices, like for frying, and salt them. In a square, oiled tray, arrange a layer of potatoes, arrange the thinly sliced fillet on top, then thin pieces of cheese.
Next, place potatoes, fillet, processed cheese. Arrange a 3rd layer of potatoes, fillet, cheese and a final layer of potatoes. Sprinkle with dill on top.
Grate a little cheese on top. Beat the eggs, add the cream, stir until homogeneous and pour this over the casserole.
Bake in a preheated 356°F (180 °C) oven about 40-45 min. Let it cool a bit and serve.