Portugal (coastal)
Portugal's foundational fish stew — layers of fish, potato, onion, tomato, and green pepper cooked together without liquid (the fish and tomatoes provide all the moisture) until the potato is tender and the fish is just cooked. The layering is literal and sequential: onion on the bottom, then potato, then tomato and pepper, then fish, then another layer — and the pot is sealed and never stirred. The varieties of fish used vary by coast and season — traditionally whatever came off the boat, layered together according to density (the firmest fish at the bottom, the most delicate on top). The finishing touch is a generous pour of olive oil and a scattering of cilantro.
No added liquid — the tomatoes and fish provide all moisture. Layer strictly: onion/garlic, potato slices, tomato/pepper, fish, repeat. Do not stir — ever. Seal the pot tightly. Cook on medium-low heat for 35-45 minutes. Open and check the potato for doneness — if the potato is tender, the dish is ready. Finish with olive oil and cilantro.
The traditional combination includes at least 3-4 fish varieties: a firm species (monkfish, ling), a medium species (sea bass, bream), and an oily species (sardine, mackerel). The potato must be waxy, not floury — it must hold its shape through the long cook. Some versions add white wine to the layers. Pair with Vinho Verde or white Douro.
Adding water or stock — the stew dilutes. Stirring — destroys the layered structure. Using only one type of fish — the complexity of flavours comes from the combination. Overcooking — the fish should still be in defined pieces at service.
My Portugal by George Mendes