In a small bowl, whisk together the dressing ingredients.
In a large bowl, combine the turkey, celery, red onion, cilantro, and feta.
Gently mix in the dressing.
Serve immediately, or cover and chill for an hour to allow the flavors to meld. Mix again before serving.
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Notes
Although you can certainly enjoy this salad immediately after making it, I find that it actually tastes better the next day, after the flavors have had a chance to meld.You can keep the leftovers in the fridge, in an airtight container, for 3-4 days. But if the turkey you use already spent some time in the fridge, you should take that into account when counting those four days.