Cook the pasta in boiling salted water for about 8 minutes. In the meantime, rinse corn and beans and drain. Clean, wash and slice the tomatoes. Peel onion, dice coarsely.
Wash the lettuce leaves and cut into strips. For the marinade, carve the chilli lengthwise, remove seeds and chop finely. Wash parsley, pluck leaves and chop coarsely. Whip vinegar, oil, lemon juice and chilli.
Season with salt and sugar. Mix salad ingredients and marinade. Serve garnished with chillies as desired.