Add the onion to some oil/ghee in a medium heated saucepan and cook down slowly until brown and soft, this should take 8-10 minutes. Ensure the onion doesn't catch, burn and become bitter.

Add the whole spices to a mortar and pestle and grind into a fine powder. Add in the other powdered spices and the salt. Add the softened onions into the mortar and pestle and grind until a thick brown fragrant paste is formed. This may take a bit of elbow grease, but get it as much as a paste as possible!

Add the diced meat to a large bowl and add in the spiced onion paste. Add the minced garlic and the yogurt. Stir everything together until the meat is well coated. Cover over and refrigerate for at least an hour or ideally overnight to marinate.

When ready to cook, add the marinated meat pieces to the skewers and heat up a grill until hot. You can use a griddle pan or an electronic grill. Drizzle some oil onto the grill and sear the skewers all over then leave until cooked through. Turn occasionally.