Break the fermented yogurt (jameed) into small pieces and place in a bowl, then add 1 cup of boiling water on top, cover it, and let it sit for a minimum of 1 hour, preferably 4+ hours.
I like to do an initial boil for my lamb to get rid of the gamy taste and gunk, so I add 1 tablespoon of oil to a pot and heat it up. Add the lamb and sear for 1 minute, then add the onion, spices, and mix.
Add enough hot water to cover and let it sit on high heat for 10–15 minutes, until it boils. Once boiling, remove the lamb and discard the spices and onion.
Now to the same pot, Add the lamb shoulder and the Mansaf spices along with the black pepper and cardamom pods, and add enough hot water to cover. Let it come to a boil before lowering the heat to medium and covering it to cook for about 45 minutes. Once the 45 minutes are up, strain the broth and set it aside. Return the lamb to the pot.
As that's cooking, add the soaked jameed pieces (withthe water) into a blender along with the Labneh and yogurt drink, and blend on high speed until smooth.
Add the yogurt sauce to the lamb, using a strainer to make sure it stays smooth. Now add 2 cups of the leftover strained broth and mix. Keep mixing on medium heat until it foams, about 10–15 minutes.
Once it is done, cover and let it cool for another 45 minutes, or until the Iamb is tender. Finish it off with the tbsp of ghee.