Soak rolls in cold water. Peel and finely chop the onion. Knead minced meat, half of the onion, squeezed out roll and egg. Season with salt and pepper. Shape meatloaf and put it on a greased baking tray.
For the crust, wash and chop the parsley. Mix remaining onion cubes, parsley and mustard and spread on the roast. Roast in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 1 hour.
Cover up in between if necessary. After approx. 45 minutes, deglaze with 1/4 litre of water. In the meantime, peel and wash the carrots, cover and cook in boiling broth for about 15 minutes. Drain and collect the broth.
Cut the carrots into slices with a colored knife. Pour the gravy through a sieve. For the sauce, heat the fat and sweat the flour in it. Add stock, gravy and cream, stirring constantly, and bring to the boil.
Season to taste with salt, pepper and paprika. Cut the roast open, arrange on a plate with carrot vegetables and some sauce. Serve garnished with parsley. Fried potatoes taste good with it.