Green bean and potato salad is a hearty and satisfying dish that is perfect for lunch or as a side dish for grilled meats. To make this salad, you will need fresh green beans, boiled potatoes, hard-boiled eggs, red onion, and a simple vinaigrette made with olive oil, red wine vinegar, and Dijon mustard. Start by blanching the green beans in boiling water for a few minutes, then shock them in ice water to stop the cooking process. Cut the boiled potatoes into bite-sized pieces, then toss them with the green beans, sliced hard-boiled eggs, and sliced red onion. Drizzle with the vinaigrette and toss to coat. This salad can be served warm or cold.