In a gallon sized zipper bag, add all ingredients for chicken and seal (press out excess air). Shake and squeeze to all is combined. Let marinade in refrigerator or at least 4 hours (up to 24hrs).
In a mason jar, combine vinaigrette ingredients. Secure lid and shake to combine. Place in refrigerator until ready to serve.
In large saute pan over medium high heat, add ½ cup of chicken marinade. Once it has come up to temperature. Add chicken breasts. Cook for 7-8 minutes on each side. Remove to cutting board and let cook at least 15 minutes until slicing into ½ inch strips.
In a large mixing bowl, combine spring mix and spinach. Pour ⅔ of dressing over mixture and toss to coat.
In a shallow bowl, build your salad. Start with a portion of greens mixture. Then add cucumbers, onions, croutons and strawberries. Next place sliced chicken breast to one side. Sprinkle with feta and sunflower seeds. Last drizzle with a little more dressing. Repeat with remaining salads
Keyword feta, feta cheese, marinade, marinated chicken, red onion, spinach, spring mix, strawberries, sunflower seeds, vinaigrette