An excellent salad to go with a Russian Barbeque! For a crunchier salad, serve it soon after adding the dressing; for a more piquant flavor, make it the day before to allow the green beans to soak up the flavors of the garlic, vinegar, and walnut .
In a small bowl, combine the walnuts, garlic, vinegar, lemon juice, water, and oil. Mix thoroughly. Let stand for 30 minutes.
Bring enough lightly salted water to a boil to cover the beans when added. Add the beans and boil until the beans are tender, about 7 minutes. Drain, refresh under cold running water, and drain again. Pat dry.
In a salad bowl, combine the beans and the onion. Add the dressing, cilantro, and more vinegar, if desired. Season to taste with salt and pepper and toss well. Serve either chilled or at room temperature.