This tomato, haricots verts, and potato salad is a refreshing and nutritious dish that is perfect for summer. The combination of fresh tomatoes, tender haricots verts, and creamy potatoes creates a satisfying and flavorful salad. The dressing, made with tangy lemon juice, Dijon mustard, and olive oil, adds a zesty kick to the salad. Serve this salad as a side dish or a light lunch, and enjoy the vibrant colors and flavors of this delicious summer salad.