Clean, wash and chop the beans. Cook in little boiling salted water for about 10 minutes. Then drain, rinse with cold water and let drain. Peel onion and cut into thin rings. Clean, wash and cut the bell peppers into pieces. Wash tomatoes
Clean, wash, spin-dry and chop salads
For the dressing mix the stock and both vinegars. Drain oil from the tuna can and collect. Beat the oil from the tin or olive oil vigorously into the dressing. Season with salt and pepper
Mix beans, peppers, tomatoes, onion, salads and dressing. Serve tuna in a can with the Nice salad and a baguette