Clean and peel the kohlrabi and cut into thin slices. Peel and wash the potatoes and cut or slice them very finely. Layer kohlrabi and potatoes fan-shaped in a greased gratin dish. Season with salt and pepper. Pour cream over it. Bake gratin in the preheated oven (electric cooker: 200 °C/ gas: level 3) for 45-50 minutes. In the meantime, grate the cheese and sprinkle it on the gratin about 15 minutes before the end of the baking time.
Wash the meat and pat dry. Heat the oil in a pan (a grill pan if you like) and fry the meat for about 2 minutes on each side. Season with salt and pepper. Remove gratin from the oven. Arrange a piece of gratin and schnitzel sprinkled with green pepper on a plate. Serve garnished with lettuce, tomato rose and parsley