Fry the schnitzel in hot oil on both sides. Season with salt and pepper, spread a thin layer of mustard and tomato paste on both sides and place in a greased baking dish.
Cut the onions into slices, cut the bacon into strips and sauté in the remaining fat. Drain the puzsta salad and mushrooms on a sieve, add to the onions, mix with the cream and spread over the schnitzel. Put the schnitzel in the oven and cook at 160 degrees (hot air) or 180 degrees (top / bottom heat) for about 45 minutes.