Cut in large pieces the leaves of the salad in a bowl. Add the beans cut in half, the tomatoes, the tuna, after straining it well, the potatoes cut in ring-shape, the pepper, and finally sprinkle the salt and the pepper...
Boil the spaghetti “al dente” in salty water and withdraw the boiling pan from the fire 4 minutes before the end of the boiling time on the packaging instructions...