Clean, wash and chop the beans. Put in boiling salted water, cook for 10 minutes. Then pour into a sieve and drain well. In the meantime, wash potatoes thoroughly and cook in boiling salted water for about 20 minutes. Drain, rinse and peel. Halve potatoes as desired. Meanwhile peel onion and dice coarsely. Heat the oil in a small pot and fry the onions until transparent. Deglaze with broth and bring to the boil. Remove from the heat, stir in vinegar and season to taste with salt, pepper and sugar. Clean, wash and slice the tomatoes. Wash the chives, dab dry (put some stalks aside for garnishing) and cut into fine rolls. Carefully mix the potatoes, beans, chives, onions and tomatoes, pour the vinaigrette over it and let it stand for about 1 hour. Serve garnished with chives
With 10 people:
Waiting time approx. 1 hour