Cut the onion in half with the skin, fry the cut surfaces in a frying pan without fat until brown. Clean the greens. Put onion, greens, white peppercorns and boiled beef in 3 liters of boiling water. With lid half open, cook quietly over medium heat for 2-2 12 hours.
2. lift Tafelspitz out of clear soup with a skimmer and cut into 1 cm thick slices. Arrange on a platter with a small amount of clear soup.
Serve with beet.