1: toss all the ingresients in a medium pan except the fish heads. 2: cook it in a mwsium heat for 15 mins. 3: add the fish heads and cook it for 7 mins. 4: pour in the sinigang mix sachet. 5. simmer on a low heat for anothwr 3 mins. 6. swrve hot with steamed rice. 7. enjoy!