In a large mixing bowl, combine ground chicken with finely chopped onion, minced garlic, fresh parsley, ground cumin, and ground coriander. Sprinkle in salt and ground black pepper to enhance flavors. Use your hands to mix the ingredients until well combined, about 5 minutes.

Wet your hands and form the mixture into compact, oval-shaped koftas, about 2-3 inches long. This process should take around 5-7 minutes.

Preheat your grill to medium-high heat (approximately 400°F). Lightly oil the grill grates using a paper towel dipped in olive oil.

Carefully place the koftas on the preheated grill. Grill for 10-12 minutes, turning occasionally to ensure even cooking, until golden brown.

In a separate bowl, mix plain yogurt with freshly squeezed lemon juice and a pinch of salt to taste. Whisk until smooth, which should take a couple of minutes.

Once the koftas are golden brown and cooked through, transfer them to a serving platter. Drizzle or serve the garlic yogurt sauce alongside.