1 clove garlic, peeled and crushed
2cm/戮in piece of root ginger, peeled and finely grated
juice of half a lemon
I small onion, peeled and finely chopped
3-4 cardamom pods, crushed
1 tsp chilli powder
1 tsp ground coriander
1 tsp ground cumin
salt
2.5ml/陆 tsp ground turmeric
1 tbsp vegetable oil
210ml/7fl oz double cream