Persian lamb tagine - Good Food Middle East

Ingredients

• 2kg lamb neck fillets
• 5 tbsp mild olive oil or sunflower oil
• 3 medium onions, cut into thin wedges
• 4 garlic cloves, finely chopped
• 4 tsp ground cumin
• 4 tsp ground coriander
• 1 tsp hot chilli powder
• 1 tsp ground turmeric
• large pinch of saffron
• 2 cinnamon sticks
• 2 preserved lemons (from a jar), drained and cut into thin wedges
• 300g ready-to-eat dried apricots
• 250g ready-to-eat dried pitted dates
• 100g shelled pistachios
• 2 tsp rosewater
• 25g cornflour
• small bunch coriander, leaves roughly chopped
• cooked couscous or basmati rice, to serve