I had never heard of the fruit before ... or halves of calamansi, and then you season your food to taste." While uncommon and not something you'd see in the Philippines, you could add calamansi ...

A citrus fruit from the Philippines, calamansi - also called calamondin - is tiny, about 2cm in diameter, but it is intense and tart, with a distinctive flavour. The fruit is usually harvested ...