-
1
Pat each fish completely dry with kitchen paper — no surface moisture should remain, so the flour coats the skin cleanly rather than clumping and falling away in the oil. Dredge lightly in flour, shaking off any excess so only a thin, even coat adheres.
-
2
Heat the olive oil in a wide, heavy pan over a high flame until it shimmers and a pinch of flour dropped in sizzles immediately. Fry the fish in uncrowded batches until the exterior is deeply golden and rigid to the touch — the crust must be fully set, because this is where the dish lives or dies: a crust that is not fully formed before the marinade is added will dissolve to mush, and fish that is still warm will trap steam beneath the marinade, with the same result. Lift onto a rack or absorbent paper and allow to cool completely to room temperature.
-
3
Dissolve the saffron threads in 2 tablespoons of warm vinegar and allow to steep for five minutes until the liquid is a deep gold, so the threads surrender their colour and floral fragrance fully before the remaining vinegar dilutes them. Combine with the remaining vinegar, the salt, and the bay leaves in a small saucepan and bring to a gentle simmer — the marinade must be hot when it meets the fish so that the saffron colour and flavour penetrate the flesh rather than sitting on its surface. The liquid should smell sharply of vinegar with an underlying floral note from the saffron.
-
4
Layer the cooled fried fish in a terracotta or glass container, so the vinegar does not take on any metallic sharpness from a reactive vessel. Pour the hot saffron-vinegar marinade over them at once, ensuring every piece is fully submerged. The fish will take on the deep golden-yellow of the saffron immediately on contact.
-
5
Cover the container and refrigerate for a minimum of 24 hours, and up to 48, so the vinegar mellows from sharp to rounded and the saffron colour travels evenly into the flesh. The scapece is ready when the crust has yielded to a structured but no longer brittle texture; the fish keeps for 4–5 days refrigerated and the flavour deepens with time. Serve at room temperature as antipasto.