In the same pan, add all the ingredients for the escabeche, mix and let it come to a boil.
AS SOON as it starts to boil, remove the sauce from the heat and pour it onto the fish. You also want to lift up the fish to get some of that sauce under it.
Let it rest for AT LEAST 4 hours (2 hours if you're REALLY in a rush) but ideally overnight in the fridge.
Serve cold, at room temperature or hot, no judgement here. Serve it with sliced cooked sweet potato, hardboiled egg and olives. It's also good with a portion of rice if you like it.