There’s something magical about a salad that’s both simple and bursting with flavor. This marinated cucumber, onion, and tomato salad is exactly that—a refreshing, tangy, and slightly sweet dish that’s perfect for summer gatherings, quick weeknight sides, or even meal prep. The best part? It comes together in just 15 minutes and only gets better as it sits in the fridge.
The beauty of this recipe lies in its simplicity. Fresh cucumbers, juicy tomatoes, and crisp onions come together in a light, flavorful dressing made with vinegar, oil, sugar, and a touch of seasoning. The dressing soaks into the vegetables, creating a perfect balance of tart and sweet with every bite.
To make it, start by whisking together the dressing ingredients—water, vinegar, oil, sugar, salt, and pepper. Then, prep your vegetables: peel and slice the cucumbers, cut the tomatoes into wedges, and slice the onion into thin rings. Toss everything together in a bowl, cover, and let it chill in the fridge for at least two hours. The longer it marinates, the more the flavors meld together.
When it comes to ingredients, you can’t go wrong. Firm cucumbers, ripe tomatoes (any variety works), and your favorite type of onion—whether sweet, red, or white—will all shine in this dish. If you want to switch things up, try using apple cider vinegar instead of white vinegar or olive oil in place of vegetable oil for a richer taste.
This salad stays fresh in the fridge for 3-5 days, making it a great make-ahead option for busy weeks. While the cucumbers may soften slightly over time, the flavors only deepen, making each bite even more delicious.
Serve it alongside grilled meats, barbecue dishes, or creamy pasta salads. It’s also a hit at potlucks—bright, fresh, and always a crowd-pleaser.
