Cover the meat with the bacon, roll up tightly with spaghetti and stick in a few sprigs of rosemary. Flour it and put it with the butter in a Reindl. Brown on all sides, sprinkle with vinegar, let it bubble up, moisten with milk and continue roasting for 2 hours with the lid closed. If necessary, add a little beef broth. Finally, season strongly with salt and freshly ground pepper.
Cut the meat into slices, arrange on a heated serving plate, pour the sauce over it and bring to the table on the spot.
Suitable accompaniment: Corn porridge (polenta).