In a small bowl, add Greek yogurt, mayonnaise and spices. Combine.
In a large bowl, add chicken, onion, tomatoes, bacon, and celery.
Add the dressing to the large bowl and combine gently until ingredients are thoroughly mixed. Add additional mayo or Greek yogurt, salt or pepper to taste.
Serve in between two slices of bread with lettuce as a sandwich, in a wrap, lettuce cup, over a salad, or with crackers and veggies.
