Generously salt and pepper the lamb shanks. Heat a large heavy bottomed pot with a lid on medium high heat until very hot, then add a splash of oil. Sear the shanks until golden brown on all sides. Turn down the heat if the oil starts smoking. When the shanks are browned, transfer them to a plate.

Add the cumin, cloves and black cardamom and swirl in the oil until you start to hear them pop. Add the garlic, ginger, onions, sugar, and salt and fry until soft and very fragrant. Add the cranberries, stir together, then nestle the lamb shanks into the cranberries and onions. Turn the heat down to low and cover with a tight fitting lid. Let this braise for 2-3 hours or until the meat easily pulls off the bone with a fork.

Serve with rice.