Clean or peel, wash and finely dice the soup vegetables. Clean and possibly wash the mushrooms.
Wash the chicken, dab dry and cut in half crosswise. Lightly salt and pepper each half of the fillet and wrap 1 slice of bacon around it. Heat oil in a pan. Brown the fillet packets in portions all around, remove from the pan and put aside.
Preheat oven (electric cooker: 200 °C/circulating air: 180 °C/gas: see manufacturer). Sauté the vegetable cubes in the remaining frying fat for approx. 2 minutes. Deglaze with wine. Stir in cream cheese, cream and mustard. Simmer for about 3 minutes. Season with salt and pepper. Put chicken parcels with mushrooms and vegetable sauce in an ovenproof dish (approx. 30 x 40 cm). Bake in a hot oven for about 30 minutes.