Fish cooked in tamarind coconut gravy. Normally in South India, any fish kuzhambu is simmered in tamarind sauce, with Kerala being an exception. They add little bit of sweetness to their preparation, by cooking them with coconut milk. Back in India a good friend of mine use to make this gravy and happened to learn this dish from her. Original recipe includes lemon juice, for which I substituted with tomatoes. Just to suit my taste I've included seasonings like cumin and fennel seeds, which are purely optional.