Season the chicken breast with sea salt, black pepper, and dried oregano.
Grill the chicken over medium-high heat for 5-6 minutes per side until cooked through, then slice into strips.
Slice the halloumi cheese into 1/2-inch thick slabs and sear in a non-stick pan over medium heat for 2 minutes per side until golden brown.
Dice the cucumber, halve the cherry tomatoes, and finely mince the red onion.
In a small bowl, toss the cucumber, tomatoes, and onion with the lemon juice.
Spread the hummus in a thick layer across the base of a large plate or platter.
Arrange the grilled chicken, warm halloumi, vegetable salad, and olives on top of the hummus.
Garnish the entire platter with chopped fresh parsley before serving.