Place the bulgur in a bowl, cover with boiling water, let sit until all the water is absorbed.
Melt the butter in a pan over medium heat.
Add and saute the onions until they begin to soften.
Add the lamb and saute.
Add the salt, seven spices and sumac, cook until meat is done.
Pour chopped onion in the bowl of a food processor.
Add the pepper, garlic, salt, cinnamon, and seven spices.
Process to mix onion and spices.
Add the bulgur and process to mix well, then add the bulgur and mix.
Add the lamb and process until well mixed.