Nicoise salad is a French salad made with mixed greens, boiled potatoes, green beans, tomatoes, hard-boiled eggs, olives, and tuna. It originated in Nice, France, and is named after the city. The salad is typically dressed with a vinaigrette made with olive oil, Dijon mustard, and red wine vinegar. Nicoise salad is a delicious and nutritious salad that is perfect for lunch or dinner.