Cod with Ratatouille Arguiñano Style: Homemade Recipe with Seasonal Vegetables

Arguiñano and cod with pisto: a Mediterranean tradition

If there's one thing that defines Karlos Arguiñano's cooking, it's his ability to turn humble ingredients into memorable dishes. Cod with pisto is a perfect example: seasonal vegetables cut into small cubes, patiently sautéed in olive oil, topped with a cod loin that practically cooks itself with the heat from the vegetables.

Pisto — that vegetable stew known by different names in every region of Spain (sanfaina in Catalonia, samfaina in Valencia, pisto manchego in Castilla) — is the ideal accompaniment for cod. The vegetables provide sweetness, acidity, and texture, while the cod contributes its clean flavor and firm flesh that flakes apart when bitten.

This recipe is inspired by Karlos Arguiñano's style, adapted to use premium Icelandic cod loins. At Bacalalo, we have been selecting the best Icelandic cod at the Mercat del Ninot in Barcelona since 1990, and for this dish, we recommend thick loins that maintain their structure on the bed of vegetables.

Ingredients for cod with pisto (serves 4)

For the cod loins

• 4 Icelandic cod loins (200g each, desalted)
• Flour for dredging
• Extra virgin olive oil
• Salt and black pepper

For the pisto

• 2 medium zucchini, diced into 1 cm cubes
• 1 large eggplant, diced into 1 cm cubes
• 2 red bell peppers, diced into 1 cm cubes
• 1 green bell pepper, diced into 1 cm cubes
• 1 large onion, finely diced
• 4 ripe tomatoes, grated
• 3 cloves garlic, thinly sliced
• 100 ml extra virgin olive oil
• 1 teaspoon sugar (optional, to correct acidity)
• Salt, black pepper, and a pinch of sweet paprika

Preparing homemade pisto step by step

Arguiñano's philosophy with vegetables is clear: each vegetable is sautéed separately or in batches, so that it retains its identity. It's not a jumble, but a harmonious whole where each ingredient stands out.

Step 1: The eggplant and zucchini

Cut the eggplant and zucchini into uniform 1-centimeter cubes. Salt the eggplant and let it rest for 15 minutes to release bitterness, then pat it dry with paper towels.

In a large skillet with plenty of olive oil, sauté the eggplant over medium-high heat for 4-5 minutes until golden brown on the outside but tender on the inside. Remove and repeat with the zucchini for 3-4 minutes. Set both aside on a plate.

Step 2: The peppers and onion

In the same skillet, reduce the heat to medium-low. Add the diced onion and sauté for 10 minutes until translucent. Add the diced red and green peppers and cook for another 8-10 minutes, stirring occasionally. The vegetables should be tender but still have some texture. Add the sliced garlic for the last 2 minutes.

Step 3: The tomato and integration

Pour the grated tomato over the sautéed vegetables. Increase the heat slightly and cook for 15 minutes, stirring every few minutes, until the tomato loses its raw flavor and thickens. Add the teaspoon of sugar if the tomato is acidic, a pinch of sweet paprika, salt, and pepper.

Reincorporate the reserved eggplant and zucchini. Mix carefully to avoid breaking the vegetable cubes. Cook everything together for 5 more minutes over low heat to allow the flavors to integrate. The pisto should have body but not be mushy: the vegetables should be clearly defined.

Cooking the cod loins

If you are using dried cod, desalinate it in cold water in the refrigerator for 48 hours, changing the water every 8-10 hours. If you prefer a product ready to cook, at Bacalalo we offer pre-desalted cod.

Step 4: Searing the loins

Pat the loins dry with paper towels and lightly dredge in flour, shaking off any excess. In a hot skillet with olive oil, sear the loins skin-side down for 3 minutes, until crispy and golden. Flip and cook for 1-2 minutes more on the flesh side. The inside should remain slightly translucent — it will finish cooking over the pisto.

Step 5: Finishing over the pisto

Place the seared loins over the hot pisto in the casserole dish. Cover and cook over very low heat for 8-10 minutes. The steam from the vegetables will slowly finish cooking the cod, keeping it juicy and flavorful. Do not move the loins during this final stage.

Assembly and plating

Arguiñano-style presentation is colorful and generous. Serve in deep plates or directly from the clay pot:

• A generous base of pisto at the bottom of the plate
• The cod loin with the golden skin visible on top
• A swirl of raw extra virgin olive oil
• Fresh chopped parsley or a few basil leaves
• Optional: some toasted pine nuts for texture

Serve with crusty country bread for dipping in the pisto. As Arguiñano says: "when the dish has good sauce, bread is essential."

Arguiñano's tricks for a perfect pisto

• Uniform cubes: Cut all vegetables to the same size (1 cm) so they cook evenly. Arguiñano insists on this: consistency in cutting is half the battle.
• Each vegetable in its own time: Sauté vegetables separately or in batches so that each retains its texture and color. If you throw everything in at once, you'll get an amorphous mush.
Generous olive oil: Pisto needs abundant oil for the vegetables to confit properly. Don't skimp — the leftover oil becomes the dish's sauce.
• Medium-low heat: Vegetables are simmered, not fried. Low heat extracts the natural sugars from each vegetable, producing sweetness instead of bitterness.
• Ripe tomatoes: Use very red and ripe tomatoes. If it's not tomato season, canned plum tomatoes are better than bland greenhouse tomatoes.
• Final rest: Let the pisto rest for 10 minutes before serving. The vegetables settle, the sauce thickens, and the flavors fully integrate.

Variations of cod with pisto

Once you've mastered the basic pisto, the variations are endless:

• With a baked egg: Make a well in the pisto and crack an egg into it. Cover and let it set with the residual heat. The runny yolk mixes with the pisto and cod spectacularly.
• Baked: Place the loins over the pisto in an oven-safe dish and bake at 180°C (350°F) for 15 minutes. The result is similar but with the advantage of not having to watch the stove.
• With piquillo peppers: Replace one of the peppers with canned piquillo peppers. They add a concentrated sweetness and an intense red color.
• Version with shredded cod: Instead of whole loins, use shredded cod mixed directly with the pisto. It's more rustic but equally delicious.

Frequently Asked Questions