Celeriac and Apple Salad with Watercress

Name: Celeriac and Apple Salad with Watercress
Ingredients: 1/2 teaspoon Meyer lemon zest, grated finely; 2 tablespoons Meyer lemon juice; 1/2 teaspoon honey; 1/2 shallot, chopped finely; 2 teaspoons dill, chopped finely; 4 tablespoons extra-virgin olive oil; 1/8 teaspoon sea salt; Freshly ground black pepper, to taste; 1/4 cup pine nuts; 1/2 medium-sized celeriac bulb, peeled and julienned; 2 Gala or other firm-fleshed apples, halved, cored, and julienned; 2 bunchs watercress, preferably hydroponic, stalks trimmed; 4 snippets dill, for garnish