01 - Combine olive oil, lemon juice, garlic, oregano, cumin, salt, and pepper in a bowl. Add chicken and toss to coat thoroughly. Cover and refrigerate for at least 15 minutes, up to 2 hours for enhanced flavor penetration.
02 - Rinse rice under cold running water until water runs clear. Combine rice, water, and salt in a saucepan. Bring to a boil, then reduce heat to low, cover tightly, and simmer for 15 minutes until liquid is absorbed and rice is tender. Fluff gently with a fork before serving.
03 - Whisk together Greek yogurt, lemon juice, olive oil, minced garlic, dill, salt, and pepper in a small bowl until smooth and well combined. Refrigerate until ready to serve to allow flavors to meld.
04 - Heat a grill pan or skillet over medium-high heat. Remove chicken from marinade, allowing excess to drip off. Cook for 5-6 minutes per side until internal temperature reaches 165°F and exterior is golden brown with distinct grill marks. Let rest for 5 minutes before slicing against the grain.
05 - Divide cooked rice evenly among 4 serving bowls. Arrange sliced chicken on top, then distribute cherry tomatoes, cucumber, red onion, Kalamata olives, and crumbled feta around the bowl. Drizzle generously with yogurt sauce and garnish with fresh parsley.
06 - Serve immediately while chicken is warm and vegetables are crisp. Offer additional yogurt sauce on the side for diners to add according to preference.