1. Boil the potatoes in salted water for about 10 minutes until tender. Drain and set aside.
2. Blanch the green beans in boiling water for 2-3 minutes until tender-crisp. Drain and rinse under cold water.
3. In a large mixing bowl, combine the lettuce, cherry tomatoes, cucumber, red onion, and olives.
4. Add the cooked potatoes and green beans to the bowl.
5. In a small bowl, whisk together the olive oil, red wine vinegar, Dijon mustard, minced garlic, salt, and pepper.
6. Pour the dressing over the salad and toss gently to combine.
7. Serve immediately and enjoy!