Bring salted water with vinegar to a boil. Beat eggs one by one in a ladle, carefully pour them into the hot water and let them steep for 3-4 min. Carefully remove the cooked eggs with a slotted spoon and place one in each soup plate. Bring beef broth to a boil and pour over eggs. Rinse and trim the chives and sprinkle over the top.
Our tip: Fresh chives are much more aromatic than dried ones!