Moroccan lamb shanks

Method Preheat oven to 170°C. Heat 1 tablespoon oil in a large frying pan over high heat. Add lamb shanks. Cook, turning, for 5 minutes or until browned. Transfer to an ovenproof dish. Reduce heat to medium. Add onion, garlic, spice mix and remaining oil to frying pan. Cook, stirring, for 2 to 3 minutes or until soft. Add tomatoes and beef stock. Bring to the boil. Pour over lamb. Cover dish tightly. Place lamb in oven. Cook for 1 1/2 hours. Stir in chickpeas. Cover and return to oven. Cook for a further 25 minutes or until lamb is tender. Remove from oven. Stir through spinach. Season with salt and pepper. Meanwhile, bring stock to the boil in a large saucepan over high heat. Reduce heat to medium. Add polenta in a thin, steady stream, stirring constantly. Cook, stirring, for 10 to 15 minutes or until mixture comes to the boil. Remove from heat. Stir in butter. Spoon polenta onto plates. Top with lamb shanks. Spoon over sauce. Serve.