Preparation
Brown the chicken in a little olive oil. Roughly chop lots of green chillis and add to the pan and fry these as well until a little blistered on the outside. Add the tomato sauce and simmer gently for 3/4 an hour. Chop the coriander (lots of it) and add then leave to stew for another 3 mins. The final result should be a thick, green looking sauce of mostly chillis and coriander. If you've added enough chilli, it should be just hot enough to make you cry.
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