Wash the meat, dab dry and, depending on the size, cut in half or in thirds. Clean, wash and halve the mushrooms. Peel and chop onions.
Heat 3 tablespoons of oil in a large frying pan. Fry the meat well in it. Season with salt and pepper. Take out. Heat 2 tablespoons of oil in the frying fat. Fry the mushrooms well in it. Fry the onions briefly.
Season with salt and pepper.
Add the meat again. Dust with flour and sweat briefly.
Stir in just under 1 l water, stock and cream. Bring to the boil, cover and simmer for about 5 minutes. Season to taste with salt, pepper and vermouth. Put into a large casserole dish. Coarsely grate the cheese and sprinkle over it. Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for about 20 minutes.
Garnish with parsley.