Season the chicken breast with half of the sea salt and black pepper.
Heat a non-stick skillet over medium-high heat and cook the chicken until the internal temperature reaches 165°F.
Remove the chicken from the pan, let it rest for 5 minutes, then dice into bite-sized cubes.
In a large mixing bowl, combine the chickpeas, diced cucumber, halved cherry tomatoes, and finely diced red onion.
In a small jar or bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, and the remaining salt and pepper.
Add the diced chicken and crumbled feta cheese to the vegetable mixture.
Pour the dressing over the salad and toss gently to ensure all ingredients are evenly coated.
Serve immediately or chill for 30 minutes to allow the flavors to meld.