Clean the mushrooms and cut into small cubes. Rinse the chives, shake dry and cut into rolls. Mix both with mountain cheese and fried onions.
Preheat the oven to 225 ° C.
Cut the pork tenderloin into 8 slices and pound a little flat. Season with salt and pepper and place with a little space on a baking sheet lined with baking paper or in a large baking dish. Spread the cheese mixture on the schnitzel and sprinkle with paprika powder.
Fry in a hot oven at 225 ° C for about 15-20 minutes. Serve immediately.