Cardamom lamb hotpot

Name: Cardamom lamb hotpot
Ingredients: 2 large onions roughly chopped; 6 garlic cloves; 50g root ginger roughly chopped; 3 tbsp sunflower oil; 30 cardamom pods seeds removed and ground; 2 tsp ground coriander; 1kg lean diced lamb; 700ml lamb stock; 2 fresh red chillies deseeded and chopped; 3 tbsp tomato purée; 100g creamed coconut (from a block), chopped; 20 fresh curry leaves; 2 aubergines cubed; 400g bag spinach; 1 ½kg large new potato; 2 tbsp sunflower oil; 3 tbsp tamarind paste; ½ tsp turmeric; 1 tsp cumin seed; 10 fresh curry leaves