In a large mixing bowl, combine the basil pesto, Greek yogurt, and fresh lemon juice. Stir well until smooth and creamy.
Add the shredded rotisserie chicken, celery, red onion, and cherry tomatoes to the bowl. Toss everything together until evenly coated with the pesto mixture.
If using, sprinkle toasted pine nuts over the salad for added texture and flavor.
Season with salt and pepper to taste, adjusting as needed.
Serve the chicken salad over a bed of fresh spinach or mixed greens, or enjoy it on its own.
Notes
You can substitute plain Greek yogurt with mayonnaise for a creamier texture. Add more lemon juice for extra tang.