Season the chicken breast with half of the sea salt and black pepper.
Grill or pan-sear the chicken over medium-high heat for 6-7 minutes per side until the internal temperature reaches 165 degrees Fahrenheit.
While the chicken is cooking, dice the cucumber into bite-sized pieces, halve the cherry tomatoes, and finely mince the red onion.
Rinse and drain the chickpeas thoroughly in a colander.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, and the remaining salt and pepper to create the dressing.
Once the chicken is cooked, let it rest for 3 minutes before slicing it into thin strips or cubes.
In a large salad bowl, combine the sliced chicken, chickpeas, cucumber, tomatoes, and red onion.
Drizzle the dressing over the salad and crumble the feta cheese on top.
Toss everything gently to ensure even coating and serve immediately.