For the green bean salad, unthread the green bean, wash and break into pieces. Boil or steam in salted water for about 15 min, drain.
For the sauce, peel the shallots, dice finely, mix with the other ingredients of the sauce, mix with the beans while they are still warm and let them stand for a few hours.
Clean the mushrooms, slice them finely, fold them into the fisole salad and sprinkle with chive rolls.