Clean, wash and possibly halve the beans. Cook in boiling salted water for about 15 minutes. Wash, clean and slice the tomatoes. Dice cheese. Quench beans cold and drain.
Pluck the thyme and rosemary leaves from the stalks. Mix vinegar, herbs, salt and pepper and add oil. Arrange beans, tomatoes, feta cheese and olives on a plate. Add the herb vinaigrette.