Rinse bean seeds well and let them drain. Peel the onions, cut them into fine rings, sprinkle them with vinegar and let them steep. Wash lettuce leaves and cut into strips. Dice the feta cheese.
Chop the chilli finely. Mix Italian herbs, chili, vinegar with onion rings and oil. Season with salt, pepper and sugar. Mix salad strips and beans with the marinade. Carefully fold in the feta cheese.
Serve with fresh baguette.