Wash your Fish with lemon,cut and remove the dirt in the fish head,get a bowl with chilli powder,garlic and ginger.and grind them to paste and add oil.then spread over the fish cover and keep in d fridge to marinate for about 2hours.place a foil paper on a baking tray and place your fish and blend your tomatoes and pepper,and onions paste and mix together with the potatoes with salt and seasoning and place on the fish.grilled on medium till is done.