Soak the buns. Peel and finely chop the onions. Knead with minced meat, squeezed out rolls, eggs, mustard, salt and pepper until smooth
Press the mince flat on foil to form a rectangle (approx. 20 x 26 cm). Cover with slices of ham and cheese. Roll up from the long side using the foil. Press the ends of the chopping roll and place on a lightly oiled baking tray. Bake in a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 1 hour
Clean the mushrooms, wash if necessary and cut into slices. Fry them in hot fat. Season with salt and pepper. Deglaze with 1/8 l water, wine and cream, stir in broth. Bring to the boil, thicken and season to taste. Arrange everything, garnish if necessary. Goes well with parsley potatoes