Bonito-Stuffed Onions: A Northern Spanish Treasure

Prep Time: 25 min
Cook Time: 45 min
Total Time: 1h 10min
4 Servings
4.4(7 reviews)

I discovered this gem during a memorable culinary journey through Asturias, where a local grandmother showed me how her family had been making these stuffed onions since the mid-1800s. What captivated me wasn't just the ingenious use of onions as natural bowls, but how this humble dish represents the perfect marriage of land and sea. The way the sweet onion caramelizes around the omega-3 rich bonito creates something truly magical – it's comfort food that nourishes both body and soul. Every time I prepare these, I'm transported back to that cozy kitchen overlooking the Cantabrian Sea.

11Ingredients

Person(s)4
  • 4 units Large onions
  • 200 g Bonito del Norte in olive oil
  • 500 g Ripe tomatoes
  • 1 unit Red bell pepper
  • 2 units Garlic cloves
  • 3 tablespoons Olive oil (extra virgin)
  • 2 tablespoons (chopped) Fresh parsley
  • 1 pinch Pinch of smoked paprika
  • ½ teaspoon Dried oregano
  • 1 to taste Salt
  • 1 to taste Black pepper

Nutrition Facts

Calories380
Protein28g
Carbs35g
Fat18g
Fiber7g
Sodiummg

Instructions

1

Prepare the onions: Cut a small slice from the bottom of each onion to make them stand upright. Carefully hollow out the onions, leaving 2-3 outer layers intact. Chop the removed onion pulp and set aside.

2

Steam the onions: Steam the hollowed onions for about 10-15 minutes, or until slightly softened but still firm. This helps them cook evenly later. Let them cool slightly.

3

Prepare the tomato sauce: Dice the tomatoes and red bell pepper. Mince the garlic. In a saucepan, heat 2 tablespoons of olive oil over medium heat. Add the garlic and cook until fragrant. Add the chopped onion pulp, tomatoes, and red bell pepper. Season with salt, pepper, oregano, and smoked paprika. Simmer for 20-25 minutes, or until the sauce has thickened.

4

Prepare the filling: Drain the Bonito del Norte, reserving the olive oil. In a bowl, combine the Bonito del Norte with 1/2 cup of the tomato sauce. Mix well.

5

Fill the onions: Carefully fill each onion with the Bonito del Norte mixture.

6

Bake the onions: Preheat oven to 180°C (350°F). Place the filled onions in a baking dish. Spoon the remaining tomato sauce around the onions. Drizzle with the reserved olive oil from the Bonito. Cover the dish with aluminum foil and bake for 20-25 minutes, or until the onions are tender.

7

Garnish and serve: Garnish with fresh parsley before serving. Let rest for 10 minutes before serving.

Chef's Tip

The secret to perfect bonito-stuffed onions lies in patience during the caramelization process. Cook your onions low and slow until they're golden and translucent – this creates natural sweetness that beautifully balances the rich, oceanic flavor of the bonito del norte.

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