Nicoise salad is a French salad that originated in Nice. It is made with mixed greens, boiled potatoes, green beans, cherry tomatoes, hard-boiled eggs, olives, and tuna. The dressing is a simple combination of olive oil, lemon juice, Dijon mustard, and garlic. Nicoise salad is a balanced and nutritious salad that is packed with flavors and textures. It is often served as a main course for lunch or dinner.