Remove the platesetter or put a large cast iron cooking tray on top of the coals. Add some olive oil to the cast iron tray.
Slice the onions in rings and add them to the tray together with the thinly chopped ginger and garlic. Saute until translucent.
Add the Ras El Hanout and let the spices cook for a couple of minutes to release their flavours.
Add the dried prunes and stir in the orange juice and agave syrup.
Put the lamb shanks in the braising juice and let simmer for about 3-4 hours. Turn the lamb shanks every once a while so they are covered with the juices.
Remove the braising liquid when the lamb shanks are soft and almost fall of the bone. Keep the brasing liquid apart for the couscous salad.
Open a Jar of Heinz Arrabiata and pour it into the cooking tray. Let the sauce warm up for about 10 minutes while the lamb shanks are resting.