In a small bowl, whisk together the olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper to create the marinade.
Place the chicken breast in a shallow dish and coat thoroughly with the marinade; let it sit for at least 15 minutes.
Heat a non-stick skillet over medium-high heat and sear the chicken for 5-7 minutes per side until the internal temperature reaches 165 degrees Fahrenheit.
While the chicken cooks, dice the cucumber, halve the cherry tomatoes, and finely mince the red onion and fresh parsley.
Remove the chicken from the pan and let it rest for 5 minutes before slicing into thin strips.
Spread the hummus in a wide circle on a serving plate, creating a well in the center.
Arrange the sliced chicken, cucumber, tomatoes, red onion, and olives over the hummus.
Garnish the platter with crumbled feta cheese and fresh parsley before serving.