Using a small blender, blend together all dressing ingredients. Taste and adjust seasoning as needed.
Preheat grill over medium high heat. Season the chicken breasts on both sides with the mural of flavor sesasoning. Grill for 8-10 minutes. Allow to rest and then chop into bite sized pieces.
Toss the lettuce with some of the prepared dressing – dress it to your liking, don’t add it all at once.
Add the chicken, onion, avocado, blueberries, candied walnuts, and feta cheese.
Toss together and serve. Add extra dressing if desired.