2 tsp freshly chopped green bird’s-eye chillies (or to taste)
fresh coriander, to garnish
6 garlic cloves, finely chopped
4cm/1½in fresh root ginger, finely grated
3 large onions, roughly chopped
400g tin chopped tomatoes
2½ tsp cumin seeds
2 tsp garam masala
2 tsp black mustard seeds
salt
2–3 tbsp sunflower oil
2–3 tsp ground turmeric
8 chicken thighs, bone in