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Portuguese Salada de Tomate com Cebola (Tomato and Caramelized Onion Salad)

A simple Portuguese tomato salad with deeply caramelized onions and good olive oil.

Prep
23 min
Cook
38 min
Servings
3
Difficulty
Easy
4.5
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#portuguese#salad#tomato#onion#olive-oil#side-dish

About This Recipe

Salada de tomate is a staple side dish at Portuguese tables, especially in summer when tomatoes are at their ripest -- typically just sliced tomatoes dressed with olive oil, vinegar, and raw onion. This version takes the onion further, caramelizing it slowly until deeply sweet and golden, which transforms the usual sharp raw bite into something richer that plays beautifully against the tomato's acidity. The technique rests almost entirely on the onions: cooked low and slow in olive oil for a full 20-25 minutes, stirred occasionally, until they turn a deep amber and taste sweet rather than sharp. The tomatoes should be salted lightly and left to sit for a few minutes before dressing, which draws out some of their juice and concentrates their flavor, then tossed with good olive oil and a splash of vinegar just before serving. Served alongside grilled fish or meat, or simply with bread, this salad reflects Portugal's reliance on quality produce and olive oil rather than complicated technique -- simple food that depends entirely on doing the basics well.

Ingredients

Serves 3

  • 4ripe tomatoes(sliced)
  • 2large onions(thinly sliced)
  • 4 tbspolive oil(divided)
  • 2 tbspred wine vinegar
  • 1 tspsalt(divided)
  • 0.5 tspblack pepper
  • 2 tbspfresh oregano or parsley(chopped)

Instructions

  1. 1

    Caramelize the onions

    Heat 2 tablespoons olive oil in a pan over medium-low heat. Add onions and cook slowly, stirring occasionally, 20-25 minutes until deeply golden and sweet.

  2. 2

    Salt the tomatoes

    Arrange sliced tomatoes on a platter, sprinkle with half the salt, and let sit 5-10 minutes to draw out juices.

  3. 3

    Cool the onions

    Let the caramelized onions cool slightly to just warm.

  4. 4

    Dress

    Drizzle remaining olive oil and the vinegar over the tomatoes.

  5. 5

    Assemble

    Scatter the warm caramelized onions over the tomatoes.

  6. 6

    Finish

    Season with remaining salt and pepper, and scatter with fresh oregano or parsley before serving.

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Pro Tips

  • →

    Don't rush the onions -- 20-25 minutes on low heat is what develops real sweetness, not just softness.

  • →

    Salt the tomatoes and let them sit briefly before dressing; this concentrates their flavor rather than diluting the dressing.

  • →

    Use the best olive oil you have -- with so few ingredients, its quality really shows through.

Variations

  • •

    Add crumbled fresh cheese like queijo fresco for a heartier salad.

  • •

    Use a mix of heirloom tomatoes for extra color and flavor variety.

  • •

    Add olives for a briny contrast to the sweet onions.

Storage

Best eaten the same day while the tomatoes are freshest. If needed, store dressed salad in the fridge for up to 1 day, though the tomatoes will soften.

History & Origin

Simple tomato salads dressed with olive oil and vinegar are a staple of everyday Portuguese cooking, reflecting the country's Mediterranean-adjacent food culture built around fresh, high-quality produce and good olive oil.

Frequently Asked Questions

Can I use raw onion instead of caramelized?

Yes, that's the more traditional preparation -- slice it thin and soak briefly in cold water to mellow its sharpness if desired.

What's the best tomato to use?

Ripe, in-season tomatoes make the biggest difference here; off-season tomatoes will taste watery and bland by comparison.

Can I make the onions ahead of time?

Yes, caramelized onions keep refrigerated for up to a week and can be gently reheated or used at room temperature.

Nutrition Facts

Per serving (251g / 8.9 oz) · 3 servings total

Calories251kcal
Protein9g
Carbohydrates44g
Fat14g
Fiber5g
Protein9g
Carbs44g
Fat14g

Time Summary

Prep time23 min
Cook time38 min
Total time61 min

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