Ingredient availability: Calamansi,
the Filipino lime is an important flavor to this pork dish. It provides a piercing sweet citrusy flavor and aroma that's lime-like and unforgettable. Here in the States, access to the Calamansi
is easier in the west coast or warmer states where trees can grow abundantly, like they do in the Philippines. But where I live in the USA east coast, it is available in Chinatown, usually at a steep price. Since I don't have easy access to the fresh Calamansi,
I buy the frozen unsweetened concentrate
, from Asian groceries. It is a good substitute and worked well for this Pork Sisig. But if all else fails, reach for fresh lemon juice, which works wonderfully, too.