In a large bowl, stir together ground chicken, finely chopped onion, minced garlic, parsley, cumin, coriander, salt, and black pepper until fully combined.
Shape the mixture into small, oval-shaped koftas.
Heat the grill and lightly coat it with olive oil to prevent sticking.
Cook the koftas on the grill for approximately 10 to 12 minutes, turning them occasionally to ensure even cooking.
Meanwhile, whisk the plain yogurt with lemon juice and a pinch of salt in a separate bowl to create the garlic yogurt sauce.
Plate the grilled koftas and serve them alongside the prepared garlic yogurt sauce for dipping.