Cook and chop the chicken into bite-size pieces, slice and chop the apple, celery, and green onion.
Combine the mayonnaise, sour cream, lemon juice, curry powder, salt, and pepper in a medium bowl and whisking together.
In a large bowl, combine the chicken, chopped apple, celery, raisins, and cashews. Pour the mayo-curry dressing over the top. Toss everything together until mixed and all of the chicken is coated in the sauce.
Chill in the fridge for at least 30 minutes until ready to serve.
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