Prepare Marinade: In a medium bowl, combine olive oil, ground cumin, coriander, smoked paprika, turmeric, cinnamon, black pepper, salt, minced garlic, and lemon juice. Mix until well incorporated.

Marinate Chicken: Coat chicken in the marinade, cover, and refrigerate for at least 15 minutes.

Grill Chicken: Heat grill pan over medium-high heat, grill chicken for 5-7 minutes per side until cooked through. Let rest for 5 minutes before slicing.

Assemble Salad: Mix diced cucumbers, tomatoes, red onion, and parsley in a large bowl.

Make Dressing: Whisk together Greek yogurt, olive oil, lemon juice, ground cumin, salt, and pepper until smooth.

Plate: Serve salad mixture, top with sliced chicken, and drizzle with yogurt dressing. Garnish with parsley.