Sisig

Sisig is a Filipino dish made from parts of pig head and liver, usually seasoned with calamansi and chili peppers.

Sisig was first mentioned in a Kapampangan dictionary in the 17th Century meaning "to snack on something sour" and "salad". It usually refers to fruits, often unripe or half-ripe, sometimes dipped in salt and vinegar. It also refers to a method of preparing fish and meat, especially pork, which is marinated in a sour liquid such as lemon juice or vinegar, then seasoned with salt, pepper and other spices.

Source: https://en.wikipedia.org/wiki/Sisig