Peel onions and cut them into rings. Line a greased fat pan of the oven with it. Clean and wash the leek and tomatoes. Cut leek into rings, tomatoes into slices. Drain the mushrooms.
Wash herbs. Chop the parsley, cut the chives into small rolls. Wash cutlets and dab dry. Season with salt and pepper. Put the schnitzel on the onions and spread the ground pork on top. Cover with leek, tomatoes, half herbs and mushrooms.
Cover everything with cheese. Bake in the preheated oven (electric cooker: 250 °C/ convection oven: 225 °C/ gas: level 5) on the lower rack for approx. 45 minutes. Mix the cream with both sauce powders and pour over the escalopes approx. 10 minutes before the end of the cooking time.
Sprinkle with remaining herbs.