Begin by shredding the cooked chicken into bite-sized pieces if using leftovers, or cook the chicken and let it cool before shredding. A rotisserie chicken can also be used for convenience.
In a large mixing bowl, combine 1 cup of mayonnaise with 0.5 teaspoon of seasoned salt and 0.25 teaspoon of ground black pepper to create the dressing. Stir until all ingredients are well incorporated.
Add the shredded chicken to the dressing, ensuring each piece is fully coated. Next, mix in 1 tablespoon of diced red onion, 0.5 cups of sliced red grapes, 3/8 cups of chopped pecans, and 3/8 cup of finely diced celery until all ingredients are evenly distributed and the dressing is well incorporated.
Give the salad a final touch of flavor by adding 1.5 teaspoons of tangy lemon juice and 1/4 teaspoon of salt. Mix well before covering the bowl with plastic wrap and refrigerating for at least 30 minutes to allow the flavors to meld together, resulting in a delicious and well-seasoned chicken salad. Serve and enjoy!