In a medium bowl, combine the shredded or diced cooked chicken, finely chopped celery, and finely chopped red onion.
Add the mayonnaise, fresh lemon juice, salt, and black pepper to the bowl.
Stir all the ingredients together until well combined. Taste and adjust seasoning if needed.
Serve immediately or cover and refrigerate for at least 30 minutes to allow the flavors to meld.
Notes
This chicken salad is versatile and can be enjoyed in many ways. For a heartier meal, serve on toasted bread with lettuce and tomato. It's also delicious stuffed into avocado halves or served with crackers.