If using the chicken marinade, combine all marinade ingredients in a bowl, add chicken and toss to coat, cover and chill for 30 minutes. Bake or grill until cooked through, chop and set aside.
Combine dressing ingredients in a food processor or quality blender, pulse until smooth.
Assemble salad with lettuce topped with chicken, bacon, avocado, feta, and sunflower seeds. Drizzle dressing over everything and serve.