Looking for a refreshing, vibrant side dish that pairs well with almost anything? Marinated Cucumbers, Onions, and Tomatoes is a timeless classic—bright, crunchy, and bursting with the perfect tangy-sweet flavor. This salad is perfect for picnics, potlucks, or just an easy snack straight from the fridge.

The combination of crisp cucumbers, juicy tomatoes, and zesty onions marinated in a light vinaigrette is as irresistible as it is simple. It’s one of those recipes that tastes even better as it sits, allowing the flavors to meld beautifully. Whether served alongside grilled meats or piled on a sandwich, this salad brings a refreshing bite to every meal.

Ingredients for the Marinated Cucumbers, Onions, and Tomatoes

2 medium cucumbers, sliced (about 2 cups)
1 pint cherry or grape tomatoes, halved (about 2 cups, mix of red and yellow if available)
1 small sweet onion, thinly sliced
1/4 cup olive oil
1/4 cup apple cider vinegar (or white vinegar)
2 tablespoons water
1 tablespoon sugar
1 teaspoon dried parsley (or 2 tablespoons fresh, chopped)
1/2 teaspoon dried basil (or 1 tablespoon fresh, chopped)
1/2 teaspoon crushed red pepper flakes (optional, for a little heat)
1/2 teaspoon salt (adjust to taste)
1/4 teaspoon black pepper

How To Make the Marinated Cucumbers, Onions, and Tomatoes

Step 1: Prep the Vegetables

Start by washing the cucumbers and tomatoes thoroughly. Slice the cucumbers into rounds—leave the skin on for extra crunch and color. Halve the cherry or grape tomatoes, and thinly slice the sweet onion. Place all the prepped vegetables into a large mixing bowl.

Step 2: Make the Marinade

In a separate bowl or large measuring cup, combine the olive oil, apple cider vinegar, water, and sugar. Whisk until the sugar dissolves completely. Add in the dried parsley, dried basil, crushed red pepper flakes (if using), salt, and black pepper. Whisk again to ensure everything is well mixed.

Step 3: Combine and Toss

Pour the marinade over the bowl of sliced cucumbers, tomatoes, and onions. Using tongs or clean hands, gently toss everything together so the veggies are well coated in the marinade.

Step 4: Marinate

Transfer the salad to a large glass jar or an airtight container. Cover and refrigerate for at least 2 hours, preferably 4 hours or overnight. This allows the flavors to meld and the vegetables to soak up the marinade.

Step 5: Serve

Before serving, give the salad a gentle toss to redistribute the marinade. Taste and adjust the seasoning with a pinch more salt or a splash of vinegar if needed. Serve chilled for the best flavor and crunch.

Serving and Storing Marinated Cucumbers, Onions, and Tomatoes

Marinated Cucumbers, Onions, and Tomatoes are best enjoyed cold, making them a fantastic side for grilled meats, fish, or sandwiches. Serve the salad directly from the fridge, either as a vibrant appetizer or spooned over greens for an easy lunch. If you’re entertaining, present the salad in a clear bowl or mason jar to show off its colorful layers.

To store, keep the salad in an airtight container in the refrigerator. It will stay fresh and crisp for up to 3 days. As it sits, the flavors intensify, so don’t hesitate to make it ahead. Just give it a quick toss before serving to redistribute the marinade.

Frequently Asked Questions

How long does this salad last in the fridge?

The marinated salad stays fresh for about 2 to 3 days when kept in an airtight container. After that, the vegetables may lose their crunch, but the flavors will still be delicious.

Can I use different types of vinegar?

Absolutely! Apple cider vinegar adds a nice tang, but you can substitute with white vinegar, rice vinegar, or even red wine vinegar depending on your preference.

Is it possible to make this recipe sugar-free?

Yes, you can leave out the sugar or use a sugar substitute if you prefer a less sweet marinade. The salad will still have a great tangy flavor.

What other vegetables can I add?

This salad is versatile! Try adding sliced bell peppers, radishes, or even thinly sliced carrots for extra color and crunch.

Should I peel the cucumbers?

Peeling the cucumbers is optional. If you like extra crunch and a splash of color, leave the skin on. For a milder texture, peel them before slicing.

Can I use dried herbs instead of fresh?

Definitely! Dried herbs work well and add plenty of flavor, but if you have fresh parsley or basil, they’ll brighten up the salad even more.

Conclusion

Marinated Cucumbers, Onions, and Tomatoes is a go-to recipe for anyone craving something crisp, tangy, and effortless. With just a few fresh ingredients and a simple marinade, you get a dish that’s perfect for any occasion. It’s easy to prepare, adaptable to your taste, and guaranteed to bring a burst of color and flavor to your table.