Rub the meat with salt, pepper, marjoram, rosemary and grated clove of garlic. Heat the fat in a sufficiently large saucepan, sear the meat on all sides and fill up with milk.
Add mushrooms and let the meat cook gently for about 2 hours. Remove the meat and cut into slices.
Thicken the sauce with flour (mixed in a little water) and season with chopped herbs.