Moroccan lamb tagine with lemon and pomegranate couscous

INGREDIENTS

• 4 tbsp olive oil
• 8 garlic
• 4 onions
• 4 tsp grated, fresh ginger
• 1½ tbsp coriander seeds
• 3 tsp ground cinnamon
• sea salt and freshly ground black pepper
• 3kg/7lb shoulder of lamb
• 2 tbsp tomato purée
• 2kg/4½lb ripe tomatoes or 4 X 400g/14oz can tomatoes, coarsely chopped
• 4-5 tbsp honey
• 1 large or 2 small pomegranates
• 800g/1¾lb couscous
• 6 tbsp olive oil
• 2 lemons
• 1 litre/1¾ pints boiling chicken stock
• 4 tbsp chopped, fresh mint or coriander
• 1 lime
• bowl Greek yoghurt