Soak the buns. Drain the corn. Peel onions. Dice 2 onions finely, cut the rest into slices
Knead minced meat, egg, squeezed out roll, diced onion and half of the corn, season. Shape the mince into a loaf and place in a flat roasting pan. Roast in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 50-60 minutes. Mix mustard and honey. Spread the meatloaf 10 minutes before the end of the roasting time
In the meantime clean, wash and halve the mushrooms. Fry the onion slices in hot fat. Fry the mushrooms for about 5 minutes. Season with salt and pepper
Dust the mushrooms with flour and sauté briefly. Add 3/8 l water, cream and the resulting roast stock while stirring, bring to the boil. Stir in broth and simmer for about 5 minutes. Heat the rest of the corn in it. Season to taste. Boiled potatoes go well with it