Clean and wash the fish.marinate with lemon and salt and let it stay for 15 mins.fry the fish.keep aside.take some oil in a pan,put on heat,put a chopped tomato in it and mix.add a pinch of salt,mix and add the cup of water,let it cook on high heat until tomato is cooked,add in the fish PCs and lower the heat.turn after a minute or two and let it cook again for a minute or two.serve with sima or rice.