In a large bowl, combine the chickpeas, red onion, celery, and parsley.
In a small bowl, whisk together the mayonnaise, lemon juice, Dijon mustard, salt, and pepper.
Pour the dressing over the chickpea mixture and stir to combine.
Serve immediately or chill for later.
Notes
Serve on bread, crackers, or lettuce wraps. Add avocado for extra creaminess. Store leftovers in an airtight container in the refrigerator for up to 3 days.