Created by Lynn (diner524) on June 23, 2016
Step 1: Make candied walnuts: Preheat oven to 350ºF. In a large bowl, combine walnuts and egg white; add spice mixture and sugar and mix until evenly coated. Spread walnuts into an even layer on a nonstick sheet lined with parchment paper; roast in the oven until browned, about 20 minutes.
Step 2: Prepare dressing: In a medium bowl, combine crème fraîche with yogurt; whisk in lemon juice, white pepper, and truffles, if desired. Add in walnut oil, whisking briskly to emulsify. Set aside.
Step 3: Make salad: Using a mandoline on the fine comb setting or a sharp knife, julienne the celery root and apples into matchstick-size strips, being careful to avoid the seeds in the core; transfer to a mixing bowl. Gently fold the dressing into the apple mixture until well combined.
Step 4: Assemble salad: Divide the salad between chilled serving plates, using a 4" by 2" ring mold to plate the salads. Remove ring mold and garnish on top with microgreens or celery leaves. Scatter plates with alternating grape halves and candied walnut halves.