In a mixing bowl, combine olive oil, lemon juice, minced garlic, oregano, paprika, cumin, coriander, salt, and black pepper. Stir thoroughly until evenly blended. This marinade creates the characteristic gyro flavor profile.

Place chicken into the marinade, coating evenly. Cover and refrigerate for at least 30 minutes. For deeper flavor, marinate for 2–4 hours. Avoid excessive marination (overnight) as acidity may affect texture.

Grate half a cucumber and squeeze out excess moisture using a cloth or strainer. Combine cucumber with Greek yogurt, garlic, lemon juice, olive oil, and salt. Mix until smooth. Chill for best flavor development.

Heat a skillet or grill pan over medium-high heat. Add a small amount of oil if needed. Cook chicken for 5–7 minutes per side depending on thickness. Internal temperature should reach 74°C / 165°F.

Allow chicken to rest for 5 minutes before slicing. Resting preserves juices.

Slice cucumbers, halve tomatoes, thinly slice onions, and wash greens. Ensure all vegetables are fresh and crisp.

Start with rice, followed by greens, vegetables, sliced chicken, and generous spoonfuls of tzatziki sauce. Arrange ingredients attractively for visual appeal.