In a large mixing bowl, combine the ground beef, grated onion, salt, black pepper, turmeric, sumac, cumin, and paprika (if using). Mix well with your hands or a wooden spoon until all the ingredients are fully incorporated.
In a separate small bowl, whisk together the egg yolk, flour (if using), and water.
Add the egg mixture to the beef mixture and knead it well until it becomes a smooth and homogenous mixture. The egg yolk and flour help bind the mixture together and keep the kababs moist.
Divide the mixture into 4-6 portions, depending on how big you want your kababs to be.
Preheat your grill or grill pan to high heat.
Take one portion of the beef mixture and shape it around a skewer, pressing it firmly to create a long, cylindrical shape around the skewer. Repeat with the remaining portions of the beef mixture.
Place the kababs on the hot grill or grill pan and cook for about 4-5 minutes on each side, or until they are nicely charred and fully cooked.
Serve hot with flatbread, rice, grilled vegetables, and/or fresh herbs.
Check out the products below to make this recipe!