In a small glass bowl, whisk together Greek yogurt, olive oil, Dijon mustard, apple cider vinegar, and seasonings until smooth.

In a large mixing bowl, combine chicken, eggs, avocado, celery, and red onion. Gently fold the ingredients together.

Pour the dressing over the salad mixture and gently toss everything together until all ingredients are coated.

Serve immediately or store in the fridge for 30–60 minutes to let flavors meld.

Before serving, give it a gentle stir and enjoy on greens, in a wrap, or on whole-grain bread.