Clean, wash and cut the beans into pieces. Cook in boiling salted water for about 15 minutes. Cook the pasta in plenty of boiling salted water for about 10 minutes. Drain beans and noodles and let them cool down
Clean and wash the peppers. Peel onion and cut both into strips. Mix vinegar with 2 tablespoons of water, salt, pepper and sugar. Fold in the oil
Mix the noodles, beans, peppers and onion with the marinade. Allow approx. 30 minutes to soak through
Drain the tuna and pluck it into pieces. Rinse cress and cut from the bed. Fold both into the salad. Season again and sprinkle with pepper