Combine lamb ground beef and tail fat cubes by using mezzaluna knife. It will take around 30 minutes to combine lamb meat and tail fat well together. 

Combine mezzaluna cut red carmen pepper, red sweet pepper flakes and salt with the mix and use mezzaluna knife again to combine all them well. It will take additional 10 minutes to combine all the mix well. 

Put the kebab meat on to the skewers. (You can use water to prevent the kebab meat to stick on your hand.) 

Place the skewers on a charcoal grill and cook around 15 minutes. While grilling, don't forget to flip the each side of the Kebab continuously to keep the tail fat's and ingredients' juice stay in the meat.