Wash tomatoes and pepper,slice, set aside,peel,rinse,cut and pound ginger and garlic,set aside.Preheat oil,add onions,ginger and garlic paste, saute,for 1min,add fish,tomatoes and pepper, stir fry for a min,siak iru in water to remove sand, add iru,seasoning,stir,taste to adjust with salt,cook for 3mins,remove from heat..