Clean and possibly wash the mushrooms. Unscrew and chop the stems. Peel and chop onion. Wash and chop parsley. Heat oil in a pan. Fry onion and mushroom stems in it. Add the ground pork and fry briefly in the pan. Stir in parsley. Season with a little salt and pepper. Take out. Bring the tomatoes and cream to the boil in the cooking fat. Season sauce with salt, pepper and marjoram. Grate cheese finely
Place the mushrooms in a flat ovenproof casserole dish and fill with ground pork. Sprinkle with cheese. Pour tomato sauce over them. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes
Preparation time approx. 45 min