📌 Cucumber Tomato Onion Salad

Posted 20 April 2026 by: Admin #Recipes

Prep Time

15 minutes

Cook Time

0 minutes

Total Time

15 minutes

Servings

4 servings

The knife slides over the cucumber and it crunches — sharp, clean, like fresh ice under the blade. That’s what this salad is. Three vegetables, a marinade, and something surprisingly satisfying for so little effort. The recipe everyone knows but everyone gets wrong by missing two or three details that make all the difference.

Final result — A fresh and colorful cucumber tomato salad, perfect to accompany all your meals.

In the bowl, the vibrant red of the tomatoes contrasts with the pale green of the cucumber slices, almost translucent after a few minutes in the marinade. The red onion rings have softened slightly — they’ve lost their aggressive sting but kept their bite. A tangy scent of vinegar enhanced by fresh dill floats above. And the juice forming at the bottom, slightly cloudy, a mix of vinaigrette and water released by the vegetables — that’s where all the flavor concentrates.

Why you’ll love this recipe

✓Ready in 15 minutes, truly : No exaggeration. There’s nothing to cook, nothing to watch. Chop, mix, marinate. That’s it.

✓It’s better the next day : Like many marinades, the flavors meld over time. Preparing it the night before is a great idea, not a chore.

✓It goes with almost everything : Grilled chicken, kefta, fish, beef burgers — it plays the role of the fresh condiment that balances a hot and rich dish. Essential in summer.

✓Fewer than 6 ingredients : No need for a big grocery trip. The vegetables often come from the fridge or garden, and the marinade is made with pantry staples.

Ingredient Notes

Ingredients

All you need: simple vegetables and a marinade that makes all the difference.

Cucumber : Choose thin-skinned cucumbers with few seeds — small Persian or Lebanese cucumbers are perfect. If using a classic thick-skinned cucumber, peel it halfway leaving strips for color, and remove seeds with a spoon. Otherwise, the salad becomes watery quickly.
Tomatoes : Fleshy ones are preferred. Roma or Beefsteak tomatoes in summer, vine-ripened tomatoes out of season. Avoid cherry tomatoes here — they release too much juice and the texture becomes mushy. Ideal: a tomato that holds up well under the knife.
Red onion : Red onion is less aggressive than white and brings a beautiful purple color to the bowl. If you find onions too strong, soak the rings for 10 minutes in cold water before adding them — it considerably softens the heat without losing the crunch.
White wine vinegar : This is what makes the marinade. Basic white vinegar is too aggressive and flat. Apple cider vinegar works well too, with a light fruity note. Avoid balsamic vinegar — it colors everything and overpowers the vegetables.
Fresh dill : Fresh dill is the ingredient that sets this salad apart from a simple green salad. Its slightly aniseed and herbal taste pairs perfectly with cucumber. Dried, it loses a lot. If you can’t find it, flat-leaf parsley will do.

Salt the cucumber first

This is the step everyone skips. And it’s the one that makes the difference. Slice the cucumber into thin rounds — about 3 mm — then place them in a colander, sprinkle with salt, and let rest for 20 minutes. A surprising amount of water comes out. A small puddle forms under the colander. Afterward, pat dry with paper towels. The result: slices that stay crunchy in the marinade instead of soaking the whole bowl.

Tomatoes, the cut matters

Cut the tomatoes into wedges or thick half-moons — at least 1 cm. Too thin, and they disintegrate in the marinade, giving a mushy texture. The juice that naturally escapes during cutting is precious: let it fall into the bowl, it’s part of the sauce. No need to salt them, unlike the cucumber — they provide exactly the moisture needed for the marinade.

The marinade, less is more

Two tablespoons of white wine vinegar, three tablespoons of olive oil, a pinch of salt, freshly ground black pepper. That’s it. Whisk quickly in a small bowl — the vinaigrette should be slightly emulsified, with a slightly milky look. Pour over the vegetables, mix gently with your hands or a large spoon. The coarsely chopped fresh dill goes on top. The smell that rises then — tangy vinegar, fresh herbs, onion — is the signal that you’re on the right track.

And now, patience

Cover the bowl and put it in the fridge. Minimum 30 minutes. One hour is better. Two hours is even better. During this time, the vegetables soak up the marinade and the juice at the bottom of the bowl becomes a small pinkish, light brick-colored sauce. That juice is what will coat the vegetables with every spoonful. Mix just before serving so everything is well coated.

Tips & Tricks

The cucumber salting step is not optional if you want a salad that lasts more than 30 minutes without becoming a soup. Take those 20 minutes, it truly changes the result.
If preparing the salad the day before, add the fresh dill only at serving time — herbs turn black and lose their flavor upon prolonged contact with acid.
A small touch of sugar — half a teaspoon — in the marinade balances the acidity of the vinegar without sweetening the salad. Taste before deciding if you need it.

Close-up — Vegetables glistering with marinade, crunchy and melting at the same time — hard to resist.

FAQs

How long does the cucumber tomato onion salad keep?

In the refrigerator in an airtight container, it keeps for 2 days. Beyond that, the vegetables soften too much and lose their crunch. If preparing it the day before, add the fresh dill only when serving.

Why does my salad release so much water?

It’s the cucumber and tomatoes releasing their juice upon contact with salt and acid. The solution: salt the cucumber slices in a colander for 20 minutes and dry them before adding. This drastically reduces excess liquid.

Can I make this salad without dill?

Yes, no problem. Flat-leaf parsley is the most natural substitute. Fresh mint also works very well and gives a more summery version. Avoid basil, whose flavor is too dominant and doesn’t pair well with the vinegar.

Is it mandatory to peel the cucumber?

Not necessarily. Small Persian or Lebanese cucumbers with thin skin can be kept whole. For a classic thick-skinned cucumber, peel halfway leaving strips — it softens the skin and keeps some color. Thick, waxy skin remains tough even when marinated.

Can I add other ingredients?

Yes. Black olives, thinly sliced red bell pepper, crumbled feta, or a few radish slices fit perfectly. A grated garlic clove in the marinade also adds depth. Stick to fresh, crunchy additions to keep the texture right.