It's often mixed with grated bambangan seed, a wild Bornean mango relative found nowhere else, giving it a sourness no other ceviche-style dish in the world can replicate.
Thin slices of raw Spanish mackerel are tossed with lime or calamansi juice, bird's eye chilli, ginger, and shallots, sometimes with grated wild mango seed folded in for extra tang. It's a fixture of Kadazan-Dusun celebrations and now sold at markets and restaurants across Sabah.