Preheat your oven to 450°F (230°C).
Season the chicken breast generously with salt and black pepper. Place it in a shallow baking dish and roast for approximately 15–18 minutes, or until the internal temperature reaches 165°F (74°C) and the chicken is completely cooked.
Remove the chicken from the oven and shred it while still warm. You can use a stand mixer fitted with a paddle attachment, a hand mixer, or two forks.
In a large mixing bowl, add the shredded chicken, Greek yogurt, mayonnaise, diced celery, diced red onion, dried cranberries, and chopped pecans.
Drizzle the fresh lemon juice over the mixture and stir everything together until the ingredients are evenly coated in the creamy dressing.
Enjoy immediately or refrigerate until ready to serve.