Chicken Salad with Red Grapes and Walnuts

Make a dressing from the yogurt, mayo, lemon zest, lemon juice, and agave nectar; season to taste with salt and pepper.
1 cup plain non-fat Greek yogurt, may substitute sour cream, 1/4 - 1/3 cup mayonnaise, Zest of 1 lemon, 1 tablespoon fresh lemon juice, 2 tablespoons agave nectar or honey, salt and freshly ground black pepper, to taste
Stir in chicken, grapes, scallions, celery, and walnuts.
4 cups diced cooked chicken, 1 cup seedless red grapes, sliced in half lengthwise, 4 medium scallions, thinly sliced, 3 mediium ribs celery, diced, ½ cup walnut pieces, toasted
Serve chicken salad wrapped in lettuce leaves, on croissants or slider buns, as desired.
Green leaf lettuce, leaves washed and patted dry, mini croissants, slider buns, or cocktail buns