Peel the potatoes and cut into thin slices. Dice the zucchini and onion and fry or lightly sauté in a pan. Add the cream, milk, processed cheese and spices, simmer briefly.
Put the potatoes and finely chopped Wienerle in the baking dish, pour the mixture from the pan over it. Finally sprinkle with grated cheese.
Baked in the oven at approx. 180 C for 30-40 minutes.