Slow Cooked Lamb shank In Mint Gravy

lamb shank 80.0% , water 10.6% , onion 4.7% , sugar 0.9% , spirit vinegar 0.9% , corn flour 0.9% , herb 0.9% , tomato purée 0.6% , caramelised sugar syrup 0.3% , garlic puree 0.1% , salt 0.1% , carrot juice 0.0% , lamb 0.0% , lamb meat 0.0% , Lamb fat 0.0% , Preservative 0.0% , dehydrated onion 0.0% , flavouring 0.0% , Antioxidant 0.0%