Fry the chicken schnitzel on both sides in butter, then season with salt and pepper, keep warm.
Clean and chop the mushrooms.
Bring the milk, cheese, spices and herbs to the boil, add the remaining ingredients and the mushrooms and simmer covered over a low heat. Then bind with the cornstarch mixed in a little liquid.
Toast toast, top with the chicken schnitzel and pour the sauce over them. Serve immediately!