Finely grate the onion and gently squeeze out excess moisture; chop the parsley and cilantro.
In a large bowl, combine the ground chicken, grated onion, garlic, parsley, cilantro, cumin, coriander, paprika, black pepper, salt, and olive oil. Mix gently until just combined.
Cover the mixture and let it rest in the refrigerator for fifteen minutes.
Shape the mixture into evenly sized oval or log-shaped kofta.
Heat a skillet or grill pan over medium heat and lightly grease with olive oil.
Cook the kofta, turning carefully, until golden on all sides and cooked through.
In a small bowl, stir together the Greek yogurt, grated garlic, lemon juice, olive oil, and salt until smooth and creamy.
Serve the hot chicken kofta with the garlic yogurt sauce spooned over or on the side.