Start by chopping your cooked chicken into small pieces. Whether you use leftover chicken, rotisserie, or even grilled, make sure it’s cooled before you start. If you have a food processor, you can pulse the celery first to finely chop it, then add the chicken for a few more pulses. Avoid overprocessing to keep a nice texture.
Place the chopped chicken and celery in a mixing bowl. Add the sweet pickle relish, mayonnaise, and chopped eggs. Season it with salt, pepper, and a hint of garlic powder if you’d like a slightly garlicky undertone. Mix until everything is evenly coated and combined.
For the best flavor, cover the bowl and refrigerate for 30 minutes to an hour to allow the flavors to meld together. When ready, toast your bread slices, layer in fresh green lettuce, and pile on the chicken salad. Serve as a sandwich, or enjoy it as is!