Nicoise salad is a French salad that originated in the city of Nice. It is made with boiled potatoes, green beans, cherry tomatoes, hard-boiled eggs, olives, and tuna. The salad is dressed with a vinaigrette made with olive oil, Dijon mustard, and red wine vinegar. Nicoise salad is a hearty and filling salad that combines the flavors of the Mediterranean. It is a perfect choice for a light lunch or dinner.