Otak means Offal, specifically the brain of animals which is use for food. In the Philippines, Utak ng Baboy (Pork's Brain) is often made into an egg omelette. I have not tried eating "utak" yet, I think this is one healthy food as the old Filipinos said which I will never try to eat. But my eldest sister said it is very delicious and in earlier times when my mother cooks "utak", she is the first on the table. She likes to try everything exotic, from Balut, Utak, Oyster.
List of books: Otak