Mix onion soup powder, cream and milk. Wash the meat, dab dry, place in an ovenproof dish and pour on the onion cream. Bake the meat in a preheated oven (electric cooker: 200 °C / gas: level 3) for approx. 40 minutes.
In the meantime, clean and wash the Brussels sprouts and cook in boiling salted water for 20-25 minutes. Dice the bacon and leave it out in a pan. Drain the brussels sprouts and add the diced bacon. Serve the casserole garnished with parsley and add the Brussels sprouts.