Keralan Fish Curry

Three things cause fish to disintegrate in curry: cutting pieces too small, using soft-fleshed fish, and stirring with a spoon. Cut fillets into large 7–8 cm chunks — small pieces have more surface area and break apart faster. Choose firm white fish like cod, sea bass, or halibut instead of tilapia or sole. The most critical rule: never stir the curry after adding fish. Instead, hold the pan by its handles and shake it gently side to side — this moves the sauce around the fish without breaking it. Also, don't cook on high heat — a gentle simmer is all you need. The fish is done in 8–10 minutes.

Curry leaves and curry powder are completely different things — this is the most common mix-up in Indian cooking. Curry leaves are fresh, aromatic leaves from the Murraya koenigii tree; they look like small, glossy bay leaves and carry a unique citrusy, faintly smoky fragrance, and you'll find them at Indian grocery stores or in the produce section of some Asian supermarkets, usually sold as fresh sprigs. Curry powder, by contrast, is a blend of ground spices such as coriander, cumin, and turmeric that was standardized under British rule; whole spices bloomed in hot oil give more aroma, but ready-made blends, including fish curry masala made specifically for this dish, are a normal shortcut in Indian kitchens too. None of that replaces the citrusy punch of real curry leaves, so if you absolutely cannot find them, use 2 bay leaves plus the zest of half a lime, though the flavor won't be identical. Once you have a bunch of curry leaves, they're worth reusing in dishes like dal soup or chana masala.

In this recipe tamarind paste provides the sour note that balances the coconut milk's richness. The best pantry substitute is a mixture of 2 tablespoons of fresh lime juice with 1 teaspoon of brown sugar — the acidity comes from the lime while the sugar mimics tamarind's faint sweetness. Another option is 1 tablespoon of dried mango powder (amchur), which gives a similar fruity sourness, or 1 tablespoon of white wine vinegar in a pinch, though it lacks the depth. The dried fruit Kerala cooks traditionally reach for is kudampuli (Malabar tamarind, Garcinia gummi-gutta) — soak 3–4 pieces in warm water for 10 minutes and add the liquid to the curry. Kokum (Garcinia indica), the similar souring fruit used further north along the Konkan coast, is a different species but a reasonable stand-in if kudampuli isn't available.

Firm white fish works best for Keralan fish curry because it holds its shape during the 8–10 minutes of simmering. Cod, sea bass, halibut, and kingfish are ideal choices. Red snapper and swordfish also work beautifully. Salmon is not traditional and its strong flavor competes with the spices, but it can work — cook it the same way and take it off the heat as soon as the flesh turns opaque and flakes. Shrimp is a fantastic alternative — add them in the last 4–5 minutes of cooking. Traditional Kerala cooks use seer fish (king mackerel) or pearl spot, but any firm-fleshed fish from your local market will produce excellent results.

Fish curry keeps well in the refrigerator for 2 days in an airtight container. The flavors actually improve overnight as the spices meld together — it's one of those dishes that tastes better the next day. To reheat without making the fish rubbery, warm it gently over low heat on the stovetop until the sauce is bubbling and the fish is steaming hot right through (74°C). Never microwave fish curry on high — use 50% power in 30-second intervals, stirring the sauce (not the fish) between rounds. If the sauce has thickened too much in the fridge, add 2–3 tablespoons of water or coconut milk before reheating. Don't freeze fish curry — the fish texture changes dramatically when frozen and thawed.