Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Wash meat, pat dry and cut into approx. 8 equal pieces. Wrap 1 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 hot oven for about 45 minutes.
Meanwhile mix 200 ml milk with cream cheese and mustard. Season with salt and pepper, pour cream cheese sauce over the meat about 25 minutes before the end of the baking time. Bake until done.
Peel, wash and halve or quarter the potatoes. Peel garlic and cut into slices. Cook potatoes and garlic in boiling salted water for about 25 minutes. Drain potatoes and put them back into the pot.
Add 200 ml milk and butter, mash roughly with a potato masher and season with nutmeg.
Wash parsley and shake dry, pluck off the leaves and chop finely. Remove the meat from the oven and sprinkle with parsley. Serve with mashed potatoes.