Walnut salad is a salad dish that contains chopped walnuts with other ingredients. Walnut salad is a very nutritional salad as walnut is a very healthy nut. Walnut oil, lettuce leaves, vinegar, shallots, salt and pepper are other ingredients of walnut salad. Walnuts are lightly toasted before adding to the salad. Lettuce leaves should be cut into bite size and tossed with all other ingredients. Walnut salad is a great side dish in American cuisine.