From the Cook Book of Ibrahim b. al-Mahdi

[p. 48, verso] And Among Them Is Himmasiyya (a garbanzo dish)

Cut the meat in proportionate pieces and put in the pot, with water to cover and enough oil; do not throw in salt at first, for that would spoil it; put in all the spices. And let the amount of water in this dish be small as you will substitute vinegar; then put the pot on the fire, then grind the garbanzos, sieve them, clean them and throw them on the meat, and when it is all done, grind up a head of garlic and beat with good vinegar and put in the pot; then put in the salt and stir so that all parts are mixed together, and when the pot is done, take it off the fire and leave it to cool and clarify; then sprinkle with fine spices and serve. It is best, when preparing the garbanzos for this dish, to begin by soaking them in fresh water overnight; then peel and throw in the pot, and when they have cooked, take them out of the pot and grind them in the mortar, then return them to the pot and finish cooking, God willing.