Prepare the chicken
First, place the chicken breast in a ziplock bag. Add all the dressing/marinade ingredients to a small jar. Place the lid on and shake well until emulsified. Pour 1/3 of this mixture over the chicken and mix to combine. Keep refrigerated to marinate for at least 1 hour. (if in a rush you can skip marinating the chicken and go right to cooking) Keep remaining 2/3 of the mixture in the jar, refrigerated, to use as a dressing.
Heat a large non-stick pan or grill pan over medium heat. Add chicken and cook for 8-10 minutes per side, or until the internal temperature reaches 165°F. Transfer the chicken on a place and allow it to sit covered for about 10-12 minutes, then slice it.
• Fix the salad bowl: Add the lettuce to a large serving bowl. Top with tomatoes, cucumbers, onion, olives, and sliced chicken. Sprinkle with crumbled feta cheese.
• Add dressing: Finally, drizzle the dressing over the salad and toss to combine.
• Serve immediately and enjoy!