Algarve, Portugal
The cataplana is a copper hinged cooking vessel from the Algarve — two clam-shaped copper halves that clamp together hermetically and can be cooked on both sides, rotated over heat, and brought directly to the table. It is both pressure cooker and serving vessel, and the technique it enables — sealing aromatics, seafood, and wine in the shell and steaming from all sides — produces a dish impossible to replicate in any other vessel. The cataplana amêijoas (clams with chouriço, peppers, onion, white wine, and parsley) is the Algarve's signature preparation and among the most brilliant examples of simplicity in Iberian cooking. The sealed shell traps the steam from the wine and the shellfish liquor — nothing is lost.
Season and flavour the base (onion, garlic, chouriço, peppers in olive oil) in the open cataplana before adding the clams and wine. Seal firmly and cook over medium-high heat — shaking the cataplana at 2-minute intervals. The clams open in 8-10 minutes in the sealed vessel. Open at the table for theatrical steam release and aroma. Never force open clams that haven't opened — discard them.
If a cataplana is unavailable, a large covered sauté pan achieves a similar result but without the table theatre. The cataplana works equally well with mixed shellfish, fish fillets, or the classic Alentejo combination of clams and pork (amêijoas à alentejana). Polish the copper before service — the visual impact is part of the dish's identity.
Over-cooking — once the cataplana is opened and the clams are open, they are done. Not purging the clams before cooking (in salted water for 30-60 minutes). Under-seasoning the base before sealing — this is your only seasoning opportunity. Reheating — cataplana dishes should be consumed immediately.
My Portugal by George Mendes