Preheat oven to 350 degrees. Spread walnuts on a cookie sheet and toast for 5-7 minutes, stirring half way through. Remove from oven and cool for 10 minutes.
Make the Apple Cider Vinaigrette. For an even more indulgent salad, substitute walnut oil for half the olive oil.
Toss the celery, apple, and walnuts in a large bowl. Add the dressing and shaved pecorino. Toss lightly to combine.
Top with freshly ground pepper.
Serve to someone you are trying to impress, or who you love a lot, which can include yourself.