
Add the shredded chicken, onion, and celery to a large bowl then set it aside.
Mix the mayonnaise, Greek yogurt, chopped basil, lemon juice, lemon zest, garlic, salt, and black pepper together in a small bowl.
Pour the dressing over the chicken and veggies and mix until fully combined. Taste and adjust the salt and pepper if needed.
Serve immediately with your favorite crackers or use the salad as a sandwich filling.