Portuguese Recipes
Algarve Seafood Stew Steamed in Tomato and Sweet Pepper
Last updated: October 16, 2026
Cataplana is the dish that gives the pan its name. Along the Algarve coast of southern Portugal, cooks pile clams, sweet white fish, and shrimp into a hinged copper pan shaped like two clamshells, seal it shut, and let the seafood steam in its own briny juices with tomato, onion, and pepper. When the lid is unclamped at the table, a cloud of scented steam rises off a stew that tastes purely of the sea.
The whole thing is built in that one sealed pan. You soften onion, sweet pepper, and garlic, deepen them with tomato and smoked paprika, then layer the seafood on top and close the lid so nothing escapes. A few minutes of steam later the clams gape open, the fish is silky, and the broth has pulled every drop of flavor into itself. Put a loaf of bread on the table and let everyone dig in.
Why This Cataplana Works
Great cataplana is really two things done well: a base with deep tomato, pepper, and smoky flavor, and seafood steamed just to the point of tenderness and no further. Get those two right and the sealed pan does the rest. The recipe here builds a fast but full-flavored base, then layers each type of seafood so nothing turns rubbery inside the closed lid.
The base starts the way most good Portuguese seafood cooking does, with onion and sweet pepper softened slowly in olive oil, then garlic and smoked paprika stirred in, and tomato paste toasted for a minute to concentrate its sweetness. Ripe chopped tomatoes and a little broth join to make a loose, savory sauce rather than a thick one, because cataplana is meant to be spooned up and mopped with bread.
Sealing the pan is the heart of the method. Once the lid is clamped shut, the seafood cooks in trapped steam and its own juices, so the flavor stays inside instead of boiling away. Clams sit lowest so they open and season the pot, the fish rests on top where the gentle steam keeps it silky, and the shrimp cook through in the last few minutes.
It is also endlessly adaptable. Cataplana was born as a coastal, use-what-the-boats-bring dish, so the exact mix of seafood is up to you. Keep the tomato-and-pepper base and the sealed steam constant, swap the seafood to whatever is freshest, and you get a pan that tastes of the Algarve every single time.
Pro observation: Cataplana is fully halal as written, with no forbidden ingredients. The broth gets its smoky depth from smoked paprika, garlic, sweet pepper, and ripe tomato, plus the briny juices the clams release as they steam, so the pan tastes rich without a thing left out.
Ingredients
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Ingredient Notes & Substitutions
White Fish
Choose a firm fish that holds together in the sealed steam: cod, monkfish, hake, or sea bass all work well. Cut it into large chunks so the pieces stay intact rather than flaking apart. Any sustainable, firm white fillet from a trusted counter is a fine swap.
Shrimp
Large or jumbo shrimp keep a pleasant bite once cooked. Peeling them makes the stew easier to eat, though leaving the tails on looks handsome. Sea scallops make a lovely addition or substitute; add them at the same late stage as the shrimp.
Clams
Buy them live, with tightly closed shells, and keep them cold until you cook. Soak them in cold salted water to purge grit, scrub the shells, and discard any that stay open when tapped. Littleneck or Manila clams are ideal; mussels make a great addition too.
Tomatoes, Pepper & Paprika
Ripe chopped tomatoes and tomato paste build the savory base, while a red bell pepper adds sweetness and body. Smoked paprika brings the deep, warm color and smoky note the dish is known for. Finish with a squeeze of lemon for brightness.
Equipment
- Cataplana pan or lidded Dutch oven
- Tight-fitting lid
- Wooden spoon
- Sharp knife and board
- Ladle
- Colander for the clams
Before You Start
1. Purge and sort the clams first. Soak the live clams in cold salted water for 20 minutes so they spit out sand, then tap any that gape open and toss the ones that will not close, because a dead clam sealed inside the pan can spoil the whole batch.
2. Slice the onion and pepper thin and even. Inside a sealed pan they steam rather than fry, so thick wedges stay crunchy and raw-tasting while the seafood finishes; thin ribbons collapse into the tomato base in the same few minutes.
3. Season and layer the base before you clamp the lid. Once the pan is sealed you cannot stir or taste, so get the salt, smoked paprika, and tomato depth exactly where you want them while the base is still open, then lay the seafood on top.
Step-by-Step Instructions
Cataplana cooks fast once the lid goes down, so build the base first. Purge and scrub the clams, cut the fish into chunks, peel the shrimp, and slice the vegetables, then warm the bread while the pan steams so the whole meal reaches the table together.
Prep the Seafood and Vegetables
Soak the clams in cold salted water to purge grit, scrub the shells, and discard any that stay open when tapped. Cut the fish into large chunks, peel and devein the shrimp, and keep all the seafood cold. Thinly slice the onion and bell pepper and mince the garlic so everything is ready to go.
Build the Aromatic Base
Warm the olive oil in the cataplana pan or a large lidded pot over medium heat. Add the onion and bell pepper with a pinch of salt and cook 6 to 7 minutes until soft, then stir in the garlic and smoked paprika and cook for 1 minute until fragrant. Add the tomato paste and stir it around the pan for another minute so it darkens and loses its raw edge.
Add the Tomatoes and Broth
Stir in the chopped tomatoes and the seafood or vegetable broth, then add a good pinch of salt and black pepper. Bring to a gentle simmer and let it cook, uncovered, for about 12 minutes so the flavors marry and the sauce thickens slightly. Taste and adjust the seasoning now, before any seafood goes in and the pan is sealed.
Layer the Clams and Seal
Nestle the clams into the sauce, then clamp the lid shut (or cover the pot tightly) and cook 5 to 7 minutes, until the shells open. Sealed in, the clams steam in the tomato base and release their briny juices, which is what gives cataplana its flavor of the sea. Discard any clams that refuse to open after cooking.
Add the Fish and Shrimp
Open the pan and rest the fish chunks and shrimp on top of the clams and sauce, so the delicate fish steams gently rather than scorching against the bottom. Seal again and cook 4 to 5 minutes, until the fish turns opaque and flakes easily and the shrimp curl and turn pink. Keep it at a steady steam; a hard boil will toughen the seafood.
Finish and Serve
Unclamp the pan as soon as the fish and shrimp are just cooked through, letting the scented steam rise. Scatter over the chopped cilantro and add a squeeze of fresh lemon, then taste and add a little more salt if it needs it. Serve straight from the pan, making sure everyone gets a mix of seafood and broth, with plenty of rustic bread on the side.
Chef’s Tips From Real Kitchen Testing
Layer the seafood, do not stir it in. Clams go lowest to open and season the sauce, and the fish rests on top where the trapped steam cooks it gently, so nothing shreds or scorches.
Season and taste the base before you seal the lid. Once the pan is clamped shut you cannot stir or correct it, so get the salt, smoked paprika, and tomato depth right while the base is still open.
Keep the pan at a steady steam, never a rolling boil. High heat turns shrimp rubbery and breaks the fish apart, while a soft, sealed steam keeps everything silky.
Recipe Variations
Serving Suggestions
- Thick slices of warm, rustic bread for the broth
- Boiled baby potatoes tossed with olive oil
- A simple green salad with lemon dressing
- Extra lemon wedges and chopped cilantro to finish
Nutrition Facts
| Nutrient | Amount per serving |
|---|---|
| Calories | 320 |
| Protein | 42 g |
| Carbohydrates | 18 g |
| Fat | 9 g |
| Saturated Fat | 1.5 g |
| Fiber | 4 g |
| Sugar | 8 g |
| Sodium | 900 mg |
Values are estimates per serving and vary with the exact seafood and brands you use.
Make-Ahead Tips
The tomato and pepper base is even better made a day ahead. Cook it through the simmer stage, cool, and refrigerate. When you are ready to eat, reheat the base to a gentle simmer in the pan and add the seafood fresh, so it steams to order and is never overcooked.
Storage, Freezing & Reheating
Common Mistakes to Avoid
Troubleshooting
Broth too thin? A sealed pan cannot reduce, so start with ripe tomatoes and paste; if it is still thin, tip the broth into a wide pan and simmer a few minutes before serving.
Seafood tough or rubbery? It steamed too long or too hot. Layer the fish and shrimp on top, keep the heat at a gentle steam, and open the pan as soon as they are just done.
Clams did not open? A few stubborn ones are normal; discard any that stay shut after steaming, as they were not good to begin with.
A Note on Portuguese Cooking
Cataplana takes its name from the pan itself: a hinged, clam-shaped copper vessel that seals tight and steams whatever is sealed inside. The dish belongs to the Algarve, the sunny southern coast of Portugal, where fishing towns like Portimao and Lagos turned the day’s catch into a communal pan of seafood, tomato, and sweet pepper. To this day, the arrival of the sealed pan at the table and the burst of scented steam when it is unclamped is half the pleasure of the meal.
It sits in a big family of Iberian and Mediterranean seafood pots. The one it is most often set beside is caldeirada, the Portuguese fisherman’s stew: where a caldeirada is a looser, layered, brothy soup, cataplana steams tightly sealed so the seafood cooks in its own concentrated juices and tomato. It shares a soul with tomato-and-seafood cooking across the region, like a brothy acqua pazza or a pan of steamed mussels with fennel and tomatoes, and with the Basque marmitako, all of them coastal pots that turn a fresh catch into something generous.
What has kept cataplana alive is exactly what created it: it is forgiving, communal, and endlessly adaptable. Use what is freshest, keep the tomato and sweet pepper base constant, seal the pan, and put a loaf of bread on the table, and you have a meal that still tastes of the Algarve coast.