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Alexandre Bally

Atum de Cebolada

Tuna with stewed onions β€” a slow sweet cebolada built separately, the tuna seared pink and married to it at the end

Β·PortugueseΒ·Main (Fish)Β·Intermediate

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Atum de Cebolada

Yield: 4 portions

Portion: Main

Prep: 25m

Cook: 30m

Rest: 20m

Total: 1h 15m

Portions
4
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Ingredients

Tuna

  • 4 tuna steaks, ~180 g, 2 cm thick
  • 2 garlic, crushed, for the seasoning
  • 1 tbsp white wine vinegar
  • 0 to taste salt and pepper

Cebolada

  • 4 onions, sliced
  • 2 garlic, sliced
  • 60 ml olive oil
  • 2 tomatoes, chopped
  • 1 bay leaf
  • 0.5 tsp sweet paprika
  • 100 ml white wine

Method

Season the tuna, build the cebolada

  1. 1

    Season 4 tuna steaks (~180 g, 2 cm thick) with salt, pepper, 2 crushed garlic cloves and 1 tbsp white wine vinegar, and rest 20 min while you make the sauce.

    20m
    Searing Tuna to the Point (Γ  point)
  2. 2

    For the cebolada, cook 4 sliced onions and 2 sliced garlic cloves gently in 60 ml olive oil over low heat 15–20 min until soft, sweet and slumping. Add 2 chopped tomatoes, 1 bay leaf and Β½ tsp sweet paprika and cook 10 min more, then 100 ml white wine and a 5-min simmer to a loose, spoonable sauce. Season.

    25mlow

    The slow conversion from sharp to jammy is the entire point β€” don't rush the onions.

    Slow Onion Sauce (Cebolada / Zwiebelsauce)

Sear and marry

  1. 3

    Get a pan genuinely hot, film it with oil, and sear the tuna ~1–2 min per side, leaving the centre pink. (For the eastern-Algarve tradition take it more done, but pull it before it greys fully.)

    4mhigh

    Tuna punishes overcooking by going dry and chalky β€” sear hot and brief.

    Searing Tuna to the Point (Γ  point)
  2. 4

    Nestle the steaks into the cebolada, spoon the onions over, and warm together just 1–2 min β€” the residual heat finishes the fish without stewing it to dust. Serve with boiled potatoes or bread to take up the sauce.

    2m

Allergens

FishSulphites

Storage & Shelf Life

Refrigerated

Temperature: 0-4Β°C

Shelf life: 2 days

Freeze: Not recommended

The cebolada is better made ahead and reheats gently; sear and marry the tuna Γ  la minute. Reheating cooked tuna dries it out.

Plating

Sit each seared steak in a pool of the jammy cebolada with the onions spooned over, boiled potatoes or bread alongside to take up the sauce.

Garnish: The stewed onions themselves; a thread of olive oil

Serve in: Plate or shallow bowl

Temperature: Hot

The Story Behind This Dish

β€œTuna is lean, dense and meat-like, and it punishes overcooking β€” so the structure is to build the onion sauce fully, sear the fish separately, and marry them only at the end. The slow cebolada, sweet and jammy, carries the lean fish.”

Wine pairing: A rosΓ© or a light, chillable red

Disclaimer: The information provided in this recipe, including preparation methods, storage guidelines, and shelf-life recommendations, is for general guidance only. We accept no responsibility for any foodborne illness or adverse effects resulting from the preparation, handling, storage, or consumption of food made using this recipe. Always follow safe food handling practices and consult official food safety guidelines.

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