The ultimate Filipino street food that is likewise a challenge both for other Filipinos (who does not want to try this) and even foreigners are our famous Balut. Balut is a duck embryo or duck fetus or the unborn duck or even the infamous and one of the most popular "weird" foods in the world.
How to Make Balut
Scorching hot balut (hardboiled duck eggs with a partially developed 16- to 18-day old duck embryo inside) and penoy (an infertile incubated duck egg or with dead embryo) for a mid-afternoon snack for my then 12-year-old daughter (her sister was taking a nap) and a late lunch for me. You can see the partially developed duck embryo covered in egg white in the balut photo (left). I cracked the shell before taking the photo to be able to identify the parts. The veins are visible from the interior of the shell. The yolk is divided by the white which contains the embryo. The round part at the bottom is what we call bato (rock), a hard white inedible part of the balut. (Although I'm eating this part, depends on how hard it is)
This penoy is what we used to call penoy na may sabaw (literally, soupy penoy) when we were kids because, unlike ordinary harboiled eggs, this kind of penoy is more like custard. In some instances, such as the one in the photo, the center has the consistency of the yolk of a hard-boiled egg while around it is the custard-like part. According to the young vendor, it is (now) called higupin, literally, for sipping.
Whenever Manong Balut shouts at night in the streets that I want to have Balut with vinegar and salt. Wow!!! I feel energized. There is a Filipino saying that "pagkumain ka ng balut, ito ay nagpapalakas ng tuhod." (If you eat Balut, it strengthens the knees.)
It is considered a delicacy in most Southeast Asian countries, even in Hawaii. In the Philippines, Balut is considered an aphrodisiac and believed to have high protein content.