Knead the minced meat, egg, onion, mustard, spices and the squeezed bun. Coarsely grate the cheese. Chop herbs. Spread the mince with a pan knife on a piece of aluminum foil, approx. 20 x 30 cm. Spread the cheese first, then the herbs on the meat. Roll up the meatloaf by lifting the aluminum foil from the long side.
Carefully place the mince roulade in a dripping pan and fry in a preheated electric oven at 200 degrees (gas: level 3) for about 1 hour. Always pour in some water in between.
Then pour the meat stock into a saucepan. Make up to approx. 250 ml with water, season to taste as required and thicken a little. Refine with cream.
Arrange the filled mince roulade on a large platter, serve with the sauce.