Slice the chicken breast into thin, even strips for quick cooking.
Whisk together the olive oil, lemon juice, dried oregano, sea salt, and black pepper in a medium bowl.
Add the chicken strips to the marinade and toss until every piece is thoroughly coated.
Heat a large skillet over medium-high heat and sear the chicken for 3-4 minutes per side until golden brown and cooked through.
Dice the cucumber, halve the cherry tomatoes, and finely chop the red bell pepper and fresh parsley.
Spread the hummus in a thick layer across the base of a wide serving bowl.
Arrange the warm herb-marinated chicken, chopped vegetables, and Kalamata olives over the hummus.
Finish the platter with the chopped fresh parsley and serve immediately.