Cucumber Tomato Salad — Light, Vinegary Summer Side You’ll Make All Season

When Summer Asks for Something Simple and Honest

There’s a moment every summer — you’re standing at the farmer’s market or digging through your garden, and suddenly you’re holding more cucumbers and tomatoes than you know what to do with. The sun is high, the heat is real, and the last thing you want is to turn on the oven. That’s exactly the moment this Cucumber Tomato Salad was made for. It’s bright, cool, lightly tangy, and honest in the best possible way. No fuss, no complicated techniques, no twenty-ingredient dressing. Just clean produce and a simple vinegary bath that somehow makes everything taste like the purest version of summer itself.

I’ve been making some variation of this salad my entire adult life. It’s the kind of recipe that doesn’t need a recipe — and yet, when you get the details right, it becomes something genuinely special. The right cucumber-to-tomato ratio, the tiniest bit of red onion for sharpness, fresh herbs that lift the whole thing, and a dressing that’s bright without being aggressive. I’ve brought it to potlucks, served it alongside grilled fish, and eaten it straight from the bowl standing at the kitchen counter. Every single time, someone asks, “What’s in this?” And every single time, I watch their face fall a little when I tell them how simple it actually is — because simple food done well is quietly revolutionary.

At Eating Happiness, we believe that the foundation of feeling good starts with what’s on your plate most of the time. That means leaning into vegetables, choosing whole ingredients, and finding joy in food that nourishes you without requiring a nutritional calculator. This salad checks every single box. It’s hydrating, anti-inflammatory, low in calories, high in flavor — and it genuinely makes you feel lighter after eating it. That’s the kind of food we live for around here.

Why You’ll Love This Recipe

• Ready in 10 minutes flat. No cooking, no marinating required (though it gets even better with a little rest). Just chop, toss, and serve.
• Genuinely good for you. Cucumbers and tomatoes are loaded with vitamins, antioxidants, and water content — this salad hydrates while it satisfies.
• Budget-friendly and seasonal. When summer produce is at its peak, this salad costs almost nothing to make and tastes like a million dollars.
• Completely customizable. Add feta, swap the herbs, throw in some avocado — it plays well with almost anything you want to bring to the table.
• Crowd-pleaser without dietary drama. Naturally vegan, gluten-free, and dairy-free in its base form, so it works for nearly every guest at the table.
• Better the longer it sits. The dressing mingles with the vegetables over time, creating a light, flavorful brine that just gets more delicious.

Key Ingredients

The beauty of this salad is that every ingredient earns its place. English cucumbers are the ideal choice here — their thin skin means you don’t need to peel them, their seeds are minimal and tender, and they hold up beautifully without getting watery or soggy. They bring a cool, mild crunch that is absolutely essential to the salad’s refreshing character. Right alongside them, ripe Roma or vine-ripened tomatoes do the heavy lifting in terms of flavor. When tomatoes are at their peak summer sweetness, they need almost nothing else — but the acidity in the dressing draws out their natural juices and creates a light, self-made sauce at the bottom of the bowl that you’ll want to spoon over everything.

Red onion shows up in a small but mighty role. Just a quarter of a medium onion, sliced paper-thin, adds a sharpness and a pop of color that keeps the salad from tasting flat. If raw onion intimidates you, a quick 10-minute soak in cold water tames the bite considerably without losing that essential flavor contrast. The red wine vinegar is the soul of the dressing — tangy, slightly fruity, and bright without being harsh. It’s what gives this salad that signature “vinegary summer side” quality that makes it so addictive. A drizzle of extra-virgin olive oil rounds out the dressing, adding a touch of richness and helping carry the fat-soluble vitamins from the vegetables. Finally, fresh dill is the herb that makes this salad sing. It has an herbal, slightly grassy quality that pairs beautifully with cucumber in particular — though fresh parsley or fresh basil are wonderful alternatives depending on your mood and what’s growing in your garden.

Pro Tips & Variations

Getting this salad from good to truly great comes down to a few key details that make all the difference.

Salt the cucumbers first.

If you have 15 to 20 extra minutes, toss your sliced cucumbers with a pinch of salt and let them sit in a colander over the sink. This draws out excess moisture, which means your dressing won’t get diluted and your salad won’t become a watery puddle after sitting for an hour. It’s a small step with a big payoff — Serious Eats covers the science of this beautifully and it genuinely transforms the texture of any cucumber salad.

Slice everything thin and uniform.

Thin, even slices mean every bite has a balanced ratio of cucumber to tomato to onion. A mandoline makes this effortless, but a sharp knife and a little patience work just as well.

Let it marinate for at least 15 minutes.

The salad is good immediately, but it becomes something truly special after 15 to 30 minutes at room temperature or in the fridge. The vegetables release their juices, the dressing penetrates everything, and the flavors meld in a way that makes it taste like you worked much harder than you did.

Variations to Try

• Greek-style: Add crumbled feta cheese, Kalamata olives, and a pinch of dried oregano for a Mediterranean twist.
• Avocado addition: Fold in diced ripe avocado right before serving for creaminess and healthy fats.
• Spicy kick: Add thinly sliced jalapeño or a pinch of red pepper flakes to the dressing.
• Italian herb version: Swap dill for fresh basil and add a drizzle of balsamic glaze — similar in spirit to our beloved Caprese Salad with Tomato, Mozzarella, and Balsamic Glaze.
• Creamy dressing: Whisk a tablespoon of plain Greek yogurt into the dressing for a slightly creamy, tangy version that’s still light and healthy.
• Add chickpeas: Toss in a half cup of rinsed canned chickpeas to turn this into a more substantial, protein-rich side or light lunch.

What to Serve It With

This salad is endlessly versatile as a side dish. It’s spectacular next to anything off the grill — chicken, salmon, shrimp, or veggie skewers. It pairs beautifully alongside our Watermelon Feta Salad for a full summer spread, or tucked next to Southern Coleslaw at a backyard BBQ where you want a lighter, vinegar-forward alternative to the heavier, mayo-dressed sides.

Nutritional Highlights

This Cucumber Tomato Salad is one of those rare dishes that manages to be as nutritious as it is delicious. Cucumbers are approximately 96% water, making them one of nature’s most hydrating foods — they also provide vitamin K, potassium, and a group of antioxidants including flavonoids and tannins that have been shown to reduce inflammation. Tomatoes bring their own impressive nutritional resume: lycopene (a powerful antioxidant most concentrated in cooked tomatoes but still present in raw), vitamin C, vitamin A, and folate. The extra-virgin olive oil in the dressing isn’t just for flavor — it actually helps your body absorb the fat-soluble antioxidants from the tomatoes more efficiently. Food Network’s nutritional breakdown of cucumbers is a great resource if you want to dive deeper into why this humble vegetable deserves more credit. Red onion adds quercetin, a potent anti-inflammatory flavonoid, and fresh dill contributes a surprising amount of vitamins A and C per serving. Each bowl clocks in at around 90 to 110 calories depending on how generous you are with the olive oil, making this one of those sides you can eat freely and feel genuinely good about. It’s the definition of food that loves you back.

Frequently Asked Questions

Can I make Cucumber Tomato Salad ahead of time?

Yes, absolutely — with a small caveat. The salad actually improves after 15 to 30 minutes of resting, as the flavors meld and the dressing penetrates the vegetables. However, if you’re making it more than a few hours ahead, store it in an airtight container in the refrigerator and be aware that the cucumbers will release more liquid over time. To minimize this, salt and drain your cucumbers before assembling (see the tip above). It’s best consumed within 24 hours for optimal texture, though the flavor will still be delicious on day two. If you’re prepping for a party, you can slice all the vegetables and store them separately, then toss with the dressing about 20 to 30 minutes before serving.

What type of cucumber works best for this salad?

English cucumbers (also called hothouse or seedless cucumbers) are the gold standard for this recipe. Their skin is thin enough that peeling is optional, their flesh is firm and crisp, and they have minimal seeds that won’t water down your dressing. Persian cucumbers are another excellent option — they’re smaller, slightly sweeter, and similarly thin-skinned. Regular garden cucumbers or American cucumbers can absolutely work, but you’ll want to peel them (the skin is thicker and waxy) and scoop out the seeds before slicing. If you’re growing cucumbers in your backyard and they’ve gotten large and seedy, take a moment to halve them lengthwise and scrape out the seed cavity with a spoon before slicing.

How do I keep the salad from getting watery?

The key to avoiding a watery Cucumber Tomato Salad is two-fold. First, salt your cucumber slices and let them drain in a colander for 15 to 20 minutes before assembling — this draws out a surprising amount of liquid before it can dilute your dressing. Second, use Roma tomatoes or another meaty, lower-moisture tomato variety rather than very juicy beefsteak tomatoes. When you cut the tomatoes, do it over a paper towel and gently press out some of the seed gel if the tomatoes seem particularly juicy. Finally, dress the salad shortly before serving rather than hours in advance, especially if you’re transporting it. If you do find yourself with a pool of liquid at the bottom, don’t throw it out — that tangy, tomato-cucumber brine is incredible drizzled over grilled bread or used as a base for a simple vinaigrette.

Share the Goodness

If this Cucumber Tomato Salad made it onto your table this summer, we want to hear about it! Leave a comment below with how you served it, what variations you tried, or which herbs you reached for — dill, basil, parsley, we love hearing what’s growing in your garden. If you snapped a photo (and please do, because this salad is genuinely beautiful), tag us on Instagram or Pinterest so we can celebrate your fresh, healthy cooking. And if you know someone who’s always looking for quick, nutritious summer sides — the kind of recipe that makes eating well feel easy and joyful rather than restrictive — save this post and send it their way. Good food is always better when it’s shared.

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