In a large bowl, combine ground chicken, finely chopped onion, minced garlic, chopped parsley, ground cumin, ground coriander, salt, and black pepper. Mix well for about 2-3 minutes.

Dampen your hands with water and form small, compact oval-shaped koftas from the mixture. Place on a greased plate.

Preheat your grill to medium-high heat, around 400°F (200°C), and brush the grates with olive oil.

Place the koftas on the grill and cook for about 10-12 minutes, turning occasionally until golden brown and cooked through.

In a medium bowl, whisk together plain yogurt, lemon juice, and a pinch of salt until smooth.

Serve the koftas warm with the garlic yogurt sauce, and optionally with pita bread or a salad.