Dinuguan
Philippines (pre-colonial Tagalog and Visayan blood cookery tradition)
Dinuguan is the Philippines' most misunderstood delicacy — pork offal and shoulder slow-cooked in fresh pig's blood seasoned with vinegar, garlic, pork broth, long green chillies, and fish sauce until the blood thickens to a dark, almost-black sauce of extraordinary richness. The name derives from dugo (blood) and the dish is among the world's most accomplished examples of blood-based cookery. The blood must be kept liquid through constant stirring in the early stages — once it clots and is reheated with agitation it re-emulsifies into a smooth, dark sauce. The vinegar provides the acid that prevents the blood proteins from over-coagulating and creates the characteristic tangy counterpoint to the deep iron richness. Dinuguan is traditionally served with puto (steamed rice cakes) at Filipino gatherings.