Toast the almonds in a dry pan over medium heat until lightly golden, then let them cool.
Chop the cooked chicken into bite-sized pieces and place them in a mixing bowl.
Add the celery, toasted almonds, mayonnaise, lemon juice, and black pepper to the bowl.
Mix everything well until the chicken is evenly coated with the dressing.
Taste and adjust seasoning as needed, adding more lemon juice or pepper if desired.
Serve immediately or chill in the refrigerator for 30 minutes for better flavor.
Enjoy as a sandwich, wrap, or on a bed of greens for a refreshing meal.