Whisk the mayonnaise, sour cream, buttermilk, vinegar, dill and scallions in a large bowl. Fold in the chicken, celery, apple, grapes, walnuts and raisins; season with salt and pepper.
Divide the chicken salad among the lettuce leaves and top with chives and celery leaves.
Tools You May Need
Photograph by Ted and Chelsea Cavanaugh
Tools You May Need
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