In a small bowl, add dressing ingredients and whisk well. Set aside.
Add chicken to a gallon-sized freezer bag. Add half of the dressing and reserve the remaining sauce for the salad.
Shake the bag to coat the chicken well. Allow to marinate in the refrigerator for at least 2 hours.
Once marinating is complete, grill chicken on your grill (you can also bake it if you do not have a grill). Make sure the chicken is thoroughly cooked and set aside.
Keep warm but allow the chicken to rest for 10-20 minutes before slicing.
In a large salad bowl, add greens, blue cheese, walnuts, red onion, avocados, blueberries, and chicken.