01 - Whisk together olive oil, lemon juice, garlic, oregano, cumin, salt, and pepper in a bowl. Add chicken and coat thoroughly. Cover and refrigerate for at least 15 minutes, up to 2 hours for deeper flavor.
02 - Rinse rice under cold water until water runs clear. Combine rice, water, and salt in a saucepan. Bring to a boil over high heat, then reduce to low, cover tightly, and simmer for 15 minutes until all liquid is absorbed. Remove from heat and let stand covered for 5 minutes before fluffing with a fork.
03 - Combine Greek yogurt, lemon juice, olive oil, minced garlic, dill, salt, and pepper in a small bowl. Mix until smooth and well incorporated. Refrigerate until serving time to allow flavors to meld.
04 - Preheat grill pan or skillet over medium-high heat. Remove chicken from marinade, shaking off excess. Cook for 5 to 6 minutes per side until golden brown and internal temperature reaches 165°F. Transfer to a cutting board and let rest for 5 minutes before slicing against the grain.
05 - Divide fluffy rice evenly among four shallow bowls. Arrange sliced chicken on top. Scatter cherry tomatoes, cucumber, red onion, olives, and feta cheese around the chicken. Drizzle generously with yogurt sauce and garnish with fresh parsley.
06 - Serve bowls immediately while chicken is warm and vegetables are crisp. Offer extra yogurt sauce on the side for those who prefer additional dressing.