Marmitako (Basque Tuna and Potato Stew)

About This Recipe

Marmitako takes its name from the marmita, the deep iron pot Basque tuna fishermen carried aboard their boats to cook the day's catch over a small coal stove. It is a humble one-pot stew of bonito del norte (white-meat tuna), waxy potatoes, onion, green pepper, ripe tomato, and the indispensable dried choricero pepper, whose sweet smoky flesh is scraped from the skin and stirred in for body and color. The technique that defines a real marmitako is cachelar — the potatoes are not sliced but cracked apart with a paring knife (insert and twist) so the broken edges release starch and naturally thicken the broth into a glossy, almost stew-like consistency. The tuna goes in at the very end, off the heat, and is allowed to gently poach in the residual warmth for just two or three minutes; cooked any longer it becomes chalky and dry. The result is a dish that tastes of the Bay of Biscay — sweet onion, ripe tomato, the faintly smoky musk of choricero, and tuna that is still rosy at its center. In the Basque country it is served with crusty bread, a glass of txakoli, and the absolute insistence that the chef sits and eats with the company.

Ingredients

Serves 4

• 600 gfresh bonito or yellowfin tuna loin, cut into 3 cm cubes
• 800 gwaxy potatoes (Charlotte or Yukon Gold), peeled
• 2 largedried choricero peppers, soaked 30 min and pulp scraped
• 1 largewhite onion, finely chopped
• 1green Italian pepper, finely chopped
• 3ripe tomatoes, grated (skin discarded)
• 3garlic cloves, finely sliced
• 800 mllight fish stock, hot
• 60 mlSpanish extra virgin olive oil
• 1 tspsweet pimentón
• sea salt and black pepper, to taste

Instructions

1. 1

   Soak and prep the choricero

   Soak the dried choricero peppers in just-boiled water for 30 minutes until soft. Open them, discard seeds and stems, and scrape the soft pulp off the skin with a spoon. Reserve the pulp — it is the flavour soul of the dish.

2. 2

   Build the sofrito

   Heat the olive oil in a wide heavy pot over medium-low heat. Add the onion and green pepper with a pinch of salt and sweat slowly for 12 minutes until completely soft and lightly golden. Add the garlic and cook 1 minute more without colouring.

3. 3

   Add tomato and pimentón

   Stir in the grated tomato and cook 6–8 minutes until the liquid evaporates and the sofrito darkens. Pull off the heat and stir in the pimentón and the choricero pulp; cook 30 seconds more so the paprika does not scorch.

4. 4

   Crack the potatoes

   Hold each peeled potato in one hand. Insert a paring knife about 2 cm deep and twist sharply to crack off a ragged chunk — repeat to break the potato into 3 cm pieces with rough edges. This 'cachelar' technique releases starch that thickens the broth.

   Never slice the potatoes cleanly. Smooth edges will not thicken the broth and the texture is wrong.

5. 5

   Simmer

   Add the cracked potatoes to the sofrito and stir to coat. Pour in the hot fish stock to barely cover. Bring to a simmer and cook uncovered at a gentle bubble for 18–22 minutes until the potatoes are tender and the broth has thickened to a stew.

6. 6

   Add the tuna off the heat

   Taste and adjust salt and pepper. Pull the pot off the heat. Season the tuna cubes with salt and slide them into the hot stew, pressing gently to submerge. Cover and rest 3 minutes — the residual heat will poach the tuna to a rosy medium.

7. 7

   Rest and serve

   Let the stew rest 5 minutes more off the heat to settle and let flavours marry. Serve in warm bowls with crusty bread and, if you can find it, a chilled glass of txakoli.

Variations

• •

  Bonito en aceite version: stir in jarred bonito belly at the table instead of cooking raw tuna — a household weeknight shortcut.

• •

  Red pepper version: add 1 roasted red pepper to the sofrito for a sweeter, brighter stew popular around Bilbao.

• •

  Cider variant: replace 100 ml of the fish stock with dry Basque sidra for a sharper, more rustic profile.

• •

  Vegetarian: omit tuna and stir in 200 g cooked white beans plus an extra spoon of choricero pulp at the end.

Storage

Refrigerate up to 2 days; the tuna firms slightly on chilling but the stew deepens in flavour. Reheat gently — never boil — over low heat until just steaming. Freezing is not recommended: the potatoes go grainy and the tuna dries out.

Frequently Asked Questions