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Atun Encebollado (Stewed Tuna in Onions)

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This Atun Encebollado (Stewed Tuna in Onions) is a great hearty stew like dish that comes together and is all done in one skillet. Caramelized onion, with fresh tuna, white wine and fish stock all come together to make this a delicious dish!

Stewed Tuna in Onions

This is one of my all time favourite local dishes where we live.  If you love fresh tuna, you will LOVE this dish.  Almost every tapas bar will have this on their menu as a tapa, side dish or main course.  It is truly hearty, filling and delicious.  It is great on it’s own with bread, or with potatoes or french fires.  Quite often here, it will be served directly over french fires.  That is how my 10 year old loves it. 

You can use frozen tuna steaks for this recipe, but I highly recommend fresh tuna for a better taste and texture.  You just can’t beat it.  However, I know fresh tuna isn’t available everywhere, so the frozen can be substituted and still tastes nice.

over head table view of the atun encebollado
Atun Encebollado (Stewed Tuna in Onions)

What To Serve with the Atun Encebollado (Stewed Tuna In Onions)

This dish can just as easily be served with crusty bread, as it really is a stew.  So basic and so delicious.  Easily on the top 10 list in this house.

Because tuna is a meaty fish, this is quite a substantial dish.  It is quite common around these parts to have it served as just a tapa with bread sticks.  I like it that way as well, but my favourite is probably over french fries like my kids.

close up of the atun encebollado
Atun Encebollado

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Stewed Tuna in Onions

Tender pieces of tuna cooked in a white wine and fish stock with caramelized onions. A perfect comforting meal.
Prep Time15 minutes
Cook Time45 minutes
Total Time1 hour
Course: Main Course
Cuisine: Spanish
Keyword: dinner, Tuna
Servings: 4 servings
Calories: 170kcal
Author: Julia Pinney


  • 1 lb tuna fresh,cut into bite size pieces
  • 1/2 Cup white wine
  • 1 Cup fish stock
  • 2 large onions thinly sliced
  • 4 cloves garlic crushed
  • 1 Teaspoon sweet paprika
  • 1-2 bay leaves
  • Olive oil
  • 2 Tablespoons lard optional
  • Salt and pepper


  • In a large skillet set over high heat add olive oil and garlic. Toss in the onions and brown for a few minutes. Reduce heat to low and add a small amount of the wine. Caramelize the onions. This will take about 10-15 minutes. Stir the onions while they are caramelizing. If you notice them sticking to the pan, add a little splash of water. Once you have done this turn the heat back to high and add the tuna. Sear the tuna for a few minutes and add all the stock and remaining wine with bay leaves. Immediately turn the heat to low and cover. Simmer for about 10 minutes. Remove pan from heat and let stand for 15 to 20 minutes to infuse the flavours.
  • Personally, I like to make this in advance and serve it later on by reheating it. I find the tuna is more tender and it just taste better.
  • We like to serve it with Roasted Rosemary Potatoes and a chilled glass of white wine!

*A note on times provided: appliances vary, any prep and/or cook times provided are estimates only.

Nutrition Facts
Stewed Tuna in Onions
Amount Per Serving (1 serving)
Calories 170 Calories from Fat 18
% Daily Value*
Fat 2g3%
Saturated Fat 1g6%
Trans Fat 1g
Cholesterol 41mg14%
Sodium 481mg21%
Potassium 426mg12%
Carbohydrates 10g3%
Fiber 2g8%
Sugar 4g4%
Protein 25g50%
Vitamin A 688IU14%
Vitamin C 9mg11%
Calcium 81mg8%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.

By on May 25th, 2015
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