Combine turkey, apple, celery and green onions in a medium mixing bowl. Stir together yogurt, mayonnaise, lemon juice and sugar in another small bowl. Pour yogurt mixture over turkey mixture. Toss to mix well. Cover and chill for 1 to 3 hours. Serve on purple kale leaves, if desired. 2P, 0.5V, 0.5FR, -20ºC A, 3cal. 193cal, 4gm fat.