In a large bowl, combine the cooked chicken, celery, onion, salt, pepper, lemon juice, cranberries, and toasted pecans.
3 cups diced cooked chicken, ½ cup finely diced celery, ¼ cup minced red onion, 1 teaspoon Kosher salt, ½ teaspoon black pepper, 2 teaspoons lemon juice, ¾ cup dried cranberries, ½ cup pecan halves