Vegetable Carpaccio

Name: Vegetable Carpaccio
Ingredients: A small handful of large, firm radishes; 1 large carrot; 1 celery rib from the heart; 1 firm leek, white and tender green only; 1 small fennel bulb, halved and cored; Half a lemon plus 3 tablespoons fresh lemon juice; 1 teaspoon Dijon mustard; 3 tablespoons cold-pressed olive oil plus more for drizzling; 1 heaping tablespoon drained small capers; Fine sea salt; 1 firm medium artichoke; A small chunk of Parmesan cheese, for shaving; Freshly ground pepper