Steam the potatoes and beans or you can also boil them.
Place the previously washed and cut salad in a salad bowl, add the potatoes and green beans, onion and cherry tomatoes cut into quarters, Taggiasca olives and the can of tuna and lastly the eggs cut into quarters.
Mix the sauce well in a container and add it to the salad.
Mix everything and the Nicoise salad is ready.
