Whisk together the mayonnaise, yogurt, lemon juice, and all five spices in a small bowl.
Add 1/2 the dressing to the chopped chicken* and diced celery. Stir and continue to add more, by the spoonful, until it is creamy but not too saucy. Taste the finished chicken salad and add salt if needed.
Serve on croissants (or crackers, in a wrap or on fresh salad greens).
*If you are cooking your own chicken breasts, be sure to sprinkle them on both sides with salt and pepper before cooking.