For the dressing, combine all of the ingredients in a food processor and blend until smooth. Transfer to a bowl and set aside, or store in refrigerator until using.
For the burgers, gently mix all of the ingredients into a bowl and form 4 equally sized patties.
Heat a grill pan or skillet with a small amount of cooking fat over a medium-high heat.
When hot, add the chicken patties and cook for 4-5 minutes on each side, or until the center reaches 165 degrees and the juices run clear.
Serve the burgers on a bed of romaine topped with Caesar dressing, and tomato slices or onion if you’d like.
Store any remaining dressing in an airtight container in the refrigerator for up to 1 week.