Spring Greens and Shaved Celery Salad

INGREDIENTS

• 1 small shallot, finely chopped
• 3 olive oil
• 2 Sherry vinegar
• Kosher salt, freshly ground pepper
• 3 celery stalks, shaved with a mandoline or very thinly sliced, plus 1/4 cup celery leaves
• 1 small bunch arugula, stems trimmed, leaves torn
• 2 chopped pitted green olives
• 2 grated Pecorino or Parmesan (optional)