Cod-Stuffed Bell Peppers Arguiñano Style: Baked Recipe

The Arguiñano Touch in Stuffed Peppers

Cod-stuffed peppers are a classic of northern Spain that Karlos Arguiñano has elevated to a star dish on his Antena 3 program. What differentiates his version is the calculated simplicity: a light béchamel that doesn't mask the cod, wood-roasted piquillo peppers (never cheap canned ones), and a final gratin that provides a crispy texture without drying out the filling.

Arguiñano insists on a point that many home cooks overlook: the proportion between cod and béchamel. The cod must be the absolute protagonist, not a lost guest in a white mass. His ideal proportion is two-thirds cod to one-third béchamel. This achieves a creamy filling with identity.

Another key is to use piquillo peppers from Lodosa, Navarra, roasted over wood. These peppers have a natural sweetness and a meaty texture that makes them superior to any alternative. The designation of origin guarantees that they are roasted over vine shoot embers, which gives them that characteristic smoky aroma.

This dish has deep roots in Navarrese and Riojan gastronomy, where piquillo peppers are stuffed with all kinds of ingredients: seafood, meat, vegetables. But the combination with cod is perhaps the most classic and the one that best balances flavors: the sweetness of the pepper with the residual saltiness of the desalted cod.

Ingredients for 4 servings

For the pepper sauce: 4-5 extra piquillo peppers, 1 clove garlic, 100 ml fish broth, and a splash of liquid cream.

Step-by-step: preparing the cod filling

Step 1 — Sauté the onion. Finely chop the onion. In a large skillet, heat the olive oil over medium-low heat and sauté the onion for 8-10 minutes until translucent and sweet. Don't turn up the heat: the onion should sweat, not fry.

Step 2 — Add the cod. Add the shredded cod to the pan with the onion. Sauté for 3-4 minutes, stirring gently. The cod should heat through and mix with the onion without completely falling apart — we want visible pieces of fish in the final filling.

Step 3 — Prepare the light béchamel. In a separate saucepan, melt the butter over medium heat. Add the flour all at once and stir with a whisk for 1-2 minutes until the mixture (roux) bubbles slightly and smells like biscuits. Gradually pour in the milk, stirring constantly to avoid lumps. Cook for 5-6 minutes, stirring until you get a thick but not pasty béchamel. Season with pepper and a pinch of nutmeg.

Step 4 — Mix. Pour the béchamel over the cod and onion mixture. Integrate well with a spatula. The texture should be creamy and consistent, enough to fill the peppers without it leaking out. If it's too liquid, cook for a couple more minutes over low heat. Let cool for 10 minutes before stuffing — a cold filling is much easier to handle.

Stuffing the piquillo peppers

Carefully open each piquillo pepper through its natural opening. Use a small spoon or a piping bag without a nozzle to insert the filling. Fill each pepper three-quarters of the way full — if you pack them too tightly, they will break when baked.

An Arguiñano trick: close the opening of the pepper by slightly folding the edge inwards, as if closing an envelope. Place the stuffed peppers in a lightly greased baking dish, with the opening facing down so they don't open during cooking.

If you use good quality canned piquillo peppers, you'll find them soft but firm. Cheap peppers break when stuffed. Here, as in everything, the raw material makes a difference.

A detail many forget: before stuffing, drain the peppers well and gently pat them dry with kitchen paper. Excess liquid from the can dilutes the sauce and makes the dish watery.

The pepper sauce: the secret of the dish

The sauce is what transforms correct stuffed peppers into a memorable dish. Arguiñano's version is simple and powerful:

1. Sauté the garlic: slice a clove of garlic and lightly brown it in a tablespoon of olive oil. Remove before it darkens.
2. Blend the peppers: put 4-5 piquillo peppers (leftover or additional ones) in a blender with the fried garlic, 100 ml of fish broth, and a splash of liquid cream.
3. Blend until you get a fine cream. Pass it through a sieve if you want an ultra-smooth texture.
4. Heat the sauce: in a saucepan over medium heat, cook the sauce for 5 minutes to thicken it slightly. Adjust salt to taste.

This sauce has a beautiful red-orange color and a sweet-smoky flavor that envelops the stuffed peppers like a hug. It's the difference between a homemade dish and a restaurant dish.

If you want an even more intense version, you can roast the peppers for the sauce directly over the fire or in the oven instead of using canned ones. The smoky flavor is multiplied.

Baking and final gratin

Step 1 — Preheat. Preheat the oven to 190 °C with top and bottom heat.

Step 2 — Cover with sauce. Pour the pepper sauce over the stuffed peppers in the baking dish. Do not cover them completely — let them stick out slightly so that the top can gratinate.

Step 3 — Gratinate. Sprinkle grated cheese on top (optional but recommended). Bake for 15-20 minutes until bubbling and the surface is golden brown. For the last 3-4 minutes, activate only the grill for a more intense gratin. Watch to prevent burning.

Step 4 — Rest and serve. Remove from the oven and let rest for 5 minutes. Serve 3-4 peppers per person with plenty of sauce on top. Garnish with a drizzle of extra virgin olive oil and a few fresh parsley leaves.

7 professional tips for perfect stuffed peppers

1. Cold filling, hot oven: stuff the peppers with the already cooled mixture. This makes them easier to handle and prevents the peppers from breaking.
2. 2:1 ratio: two parts cod to one part béchamel. This way, the cod is dominant.
3. Do not overfill: three-quarters capacity is the maximum. If you fill them to the brim, they will burst when baked.
4. Quality peppers: Piquillo de Lodosa with Denomination of Origin. Generic ones fall apart.
5. Homemade sauce, not from a jar: the difference is huge. You only need an extra 5 minutes.
6. The final grill: 3-4 minutes under the grill creates a crispy surface that contrasts with the creamy interior.
7. Can be prepared the day before: stuff and assemble the dish the day before. Bake the next day. They even taste better because the flavors meld together.

To learn more about how to work with cod-stuffed peppers, check out our classic oven-baked stuffed pepper recipe. And if you have leftover cod from the filling, discover ideas in our article on shredded cod.

Variations of stuffed peppers

• With shrimp: add 100 g of chopped peeled shrimp to the cod filling. The contrast in textures is spectacular.
• With txangurro: substitute half of the cod with txangurro (spider crab) meat for a luxurious version.
• Without béchamel: for a lighter version, use cream cheese instead of béchamel. Fewer calories, a different but equally creamy texture.
• Large Padrón peppers: instead of piquillo, use large Padrón peppers or Italian peppers. Different flavor, equally delicious.
• Aioli gratin: instead of cheese, cover with a layer of mild aioli before gratinating. Check out our recipe for gratin cod for more inspiration.

Nutritional values per serving (4 peppers)

A balanced dish: good protein from the cod, healthy fats from the olive oil, and vitamin C from the peppers. Piquillo peppers are also rich in beta-carotenes and antioxidants.

Conclusion

Arguiñano-style cod-stuffed peppers are a classic that never fails. They are elegant enough for a dinner with guests but simple enough for a family Sunday. The key is to respect the proportions (more cod, less béchamel), use quality piquillo peppers, and not be afraid of the final gratin.

It's a dish that can be prepared in advance, reheats well, and always earns praise. If you haven't tried it yet, now is the time.

For a result that does justice to the recipe, start with good cod. At Bacalalo we select desalted cod directly from the producer, perfect for shredding. Discover our selection of desalted cod and prepare these stuffed peppers with total confidence.

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