Add the chicken, celery, relish, eggs, mayo, salt and pepper to a food processor. Pulse 3-4 times or until mixture reaches desired consistency. If you pulse too much, it will become mushy. see notes
Divide the mixture evenly onto toasted wheat bread.
Add some leafy lettuce place the other toasted bread on top and serve!
Notes
If you don't have a food processor, chop the chicken, celery, and eggs finely and add them to a bowl.
Store leftovers in an airtight container in the fridge for 3-4 days.