Roasted Purple Potato Salad with Green Garlic Dressing Serves 4 1/2 cup extra virgin olive oil 1 1/2 teaspoons salt 1/2 teaspoon freshly ground black pepper 1 pound purple potatoes, scrubbed, and cut in quarters 2 tablespoons fresh lemon juice 2 teaspoons finely minced green garlic 1 teaspoon Worcestershire sauce 2 tablespoons grated Parmigiano Reggiano, …