Put 1/3 of the cheese and the olive oil in the bottom of a large salad bowl; mix together. Add the Cherry Balsamic Vinegar and pepper to taste. Mix well to create a thick dressing. Add the apples, the sliced celery, the grapes, the arugula and the lemon juice. Toss to incorporate all the ingredients. Top the salad with the remaining cheese and the walnuts. Toss again gently and serve.