1 tsp ground coriander
1 tbsp finely grated fresh root ginger
squeeze lemon or lime juice
1 medium onion, roughly chopped
400g tin black beans, not drained
200g/7oz chopped tomatoes, from a tin
½ tsp dried chilli flakes
1 tsp cumin seeds
2 tbsp rapeseed or sunflower oil
1 tsp ground turmeric