1 fresh hot green chilli, finely chopped
3 tbsp finely chopped green coriander
10-15 curry leaves
3 garlic cloves, peeled and finely chopped
1 tbsp lemon juice
¼ tsp chilli powder or to taste
½ tsp ground roasted cumin seeds
1 tsp garam masala
1 tsp black mustard seeds
¾ tsp salt
¼ tsp sugar
1 tbsp tomato purée
3 tbsp vegetable oil
200ml/7¼fl oz tinned coconut milk, well stirred, or single cream
560g/1lb 3¾oz medium-sized prawns, uncooked, peeled, deveined and washed then patted dry