Leftover Sashimi Tacos

Revenge may be a dish best served cold; but day-old sashimi is a dish best served well-cooked.

In this case, three lovely slabs of raw fish from a local Japanese restaurant with an overly generous bento box lunch became the key ingredient in fish tacos. Sauteed onions, fresh corn tortillas, some spices - and no food poisoning! Delicious.