Wash the meat, dab dry and cut into about 8 equal pieces. Wrap a slice of bacon around each piece. Heat the oil in a large pan, fry the meat while turning it, season with salt and pepper and remove.
Place in a flat ovenproof dish. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 45 minutes.
In the meantime, mix cream, cream cheese and mustard. Season with salt and pepper. About 25 minutes before the end of the baking time, pour the cream cheese mixture over the meat and finish baking.
Peel, wash and chop the potatoes. Peel garlic and cut into slices. Cook potatoes and garlic in boiling salted water for about 25 minutes. Heat milk and butter. Drain the potatoes, mash them coarsely with a potato masher, add the milk and butter mixture.
Season to taste with nutmeg.
Wash parsley, shake dry and chop finely, except for a few leaves for garnishing. Remove meat from the oven, sprinkle with parsley and garnish. Add mashed potatoes.