01 - Whisk together olive oil, lemon juice, minced garlic, oregano, cumin, salt, and pepper in a bowl. Add the chicken pieces and toss thoroughly to coat. Cover and refrigerate for a minimum of 15 minutes, allowing up to 2 hours for deeper flavor penetration.
02 - Rinse the rice under cold running water until the water runs clear. Combine the rinsed rice, water, and salt in a saucepan. Bring to a rolling boil, then reduce heat to low, cover tightly, and simmer for 15 minutes until all liquid is absorbed and rice is tender. Fluff gently with a fork before serving.
03 - Combine Greek yogurt, lemon juice, olive oil, minced garlic, chopped dill, salt, and pepper in a small bowl. Whisk until smooth and fully incorporated. Refrigerate until ready to serve to allow flavors to meld.
04 - Preheat a grill pan or skillet over medium-high heat. Remove chicken from the marinade, allowing excess to drip off. Cook for 5 to 6 minutes per side until internal temperature reaches 165°F and the exterior develops golden-brown grill marks. Transfer to a cutting board and let rest for 5 minutes before slicing against the grain.
05 - Divide the cooked rice evenly among 4 serving bowls. Arrange sliced chicken, cherry tomatoes, cucumber, red onion, Kalamata olives, and crumbled feta over the rice in sections. Drizzle generously with the yogurt sauce and garnish with fresh chopped parsley. Serve immediately while chicken is still warm.