Prepare the onion:
Finely mince the onion and squeeze out all excess liquid using a clean cloth or paper towel. This step is essential to prevent the kebab mixture from becoming too wet.
Combine ingredients:
In a large bowl, mix ground lamb, chopped tail fat, onion, salt, paprika, cumin, coriander, black pepper, red pepper flakes, and sumac.
Knead thoroughly:
Knead the mixture by hand for 5–7 minutes until it becomes sticky and well combined. This ensures the meat binds properly and stays on the skewers.
Rest the mixture:
Cover and refrigerate for at least 30 minutes. This step improves flavor and makes shaping easier.
Shape the kebabs:
Divide into equal portions and press firmly onto metal skewers. Shape into long, flat kebabs with even thickness.
Preheat grill:
Heat your grill to medium-high. The grill should be hot enough to create a slight char.
Grill the kebabs:
Place skewers on the grill and cook for 10–12 minutes, turning occasionally until evenly cooked and slightly charred.
Rest before serving:
Remove from grill and let rest for 2–3 minutes to retain juices.
Serve:
Serve hot with flatbread, grilled vegetables, and fresh herbs.