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Peruvian Sebiche
Lay thin fillets of any very delicate fish on a platter side by side; cover with juice of freshly squeezed limes, being careful to remove all seeds, let stand at least 6-7 hours until lime juice has completely tendered fish.
When fish is ready peel 1 large firm ripe tomato, split crosswise and flick out seeds, then chop rather fine with very sharp knife: remove seeds and veins from 1 green pepper and chop. Remove seeds and veins from 1 red sweet pepper and chop (or substitute 1 canned pimiento). Mix tomato and peppers, adding 3/4 cup chopped white onion, 1 teaspoon minced parsley, 1 well crushed garlic clove (which may be removed afterward) and 1 well minced chili pepper (or 1-2 dashes Tabasco). Add vinegar until mixture is semi-liquid, season with salt, pepper and a very little sugar. Drain fish fillets thoroughly, put them on platter and spread mixture over them.
This freshly and delicately pickled fish is much better than any you'll find in the delicatessen store.
This is ceviche, and the method as printed leaves out the two safeguards that modern practice treats as non-negotiable for raw fish. The notes below explain where the recipe fails rather than how to correct it.
- Lime juice does not cook fishThe acid denatures protein so the flesh turns opaque and firm, which is what the recipe means by "tendered." It does not reach any temperature and does not reliably kill parasites or bacteria; the fish is raw throughout.
- Six to seven hours on a platterThe instruction gives no refrigeration and no covering. Fish held at room temperature for that long is well outside any safe window, and citrus acidity does not compensate. The main risk is bacterial growth; with scombroid species such as tuna or mackerel there is the additional hazard of histamine, which forms in mishandled fish and is not destroyed by acid or heat.
- No guidance on the fish itself"Any very delicate fish" is the whole specification. Current practice for raw preparations calls for fish that has been commercially frozen to a defined schedule for parasite control, and for species chosen with that in mind. Nothing in the recipe addresses either point.
- If you want cevicheUse a current recipe that specifies the fish, the sourcing, the refrigeration and the marinating time. The seasoning here — tomato, sweet and hot peppers, onion, parsley, garlic — is recognisable, but the handling is not.
- On the vinegarAdding vinegar "until mixture is semi-liquid" is one of several unmeasured steps; with no quantity for the fish either, the recipe cannot be scaled or balanced as written.