BBC Food - Recipes - Braised lamb shanks with colcannon mash

Ingredients

• 8 small lamb shanks (about 475g each)
• 2 tbsp sunflower oil
• 2 onions , finely chopped
• 2 celery sticks, finely chopped
• 2 carrots , finely chopped
• 3 garlic cloves, crushed
• 1-2 tbsp plain flour
• 375ml/13fl oz red wine
• 1 tbsp tomato purée
• 2 tbsp roughly chopped fresh rosemary
• 2 bay leaves
• 750ml/1½ pint chicken stock
• 4 tbsp finely chopped fresh mint
• 2 tbsp finely chopped garlic
• 2 tbsp finely grated lemon zest
• small handful fresh flatleaf parsley leaves
• 1.25kg/2lb 12oz floury potatoes , peeled and cubed
• 1 head savoy cabbage , washed and shredded
• 75g/2½oz butter
• 100ml/3½fl oz milk
• sea salt and freshly ground black pepper