This marinated cucumber, onion, and tomato salad is crisp, juicy, tangy, and lightly sweet. Fresh vegetables soak in a simple vinegar dressing until every bite tastes refreshing and flavorful. It is perfect for warm days, family dinners, potlucks, or as a cool side dish with grilled chicken, rice, potatoes, or sandwiches.
Why You’ll Love This Recipe
This recipe is easy to prepare and uses simple ingredients you may already have at home. The cucumbers stay crunchy, the tomatoes become extra juicy, and the onions soften slightly in the marinade without losing their bite.
It is also a great make-ahead dish because the flavor improves as it chills. The vinegar, sugar, salt, pepper, and oil create a balanced dressing that is tangy, lightly sweet, and savory. The optional fresh mint adds a cool, garden-fresh flavor that makes the salad even brighter.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
3 medium cucumbers, peeled and sliced 1/4 inch thick
1 medium onion, thinly sliced and separated into rings
3 medium tomatoes, cut into wedges
1/2 cup vinegar
1/4 cup granulated sugar
1 cup cold water
2 teaspoons salt
1 teaspoon fresh coarse ground black pepper
1/4 cup oil
1 teaspoon chopped fresh mint, optional
Directions
Place the sliced cucumbers, onion rings, and tomato wedges in a large mixing bowl. Use a bowl with enough space so the vegetables can be tossed without breaking the tomatoes too much.
In the same bowl, add the vinegar, sugar, cold water, salt, black pepper, and oil. Sprinkle in the chopped fresh mint if using.
Gently toss everything together until the vegetables are evenly coated in the marinade. Stir carefully so the tomatoes keep their shape.
Cover the bowl and refrigerate for at least 2 hours before serving. For best flavor, stir once halfway through chilling so all the vegetables absorb the dressing evenly.
Serve cold with some of the marinade spooned over the top.
For a brighter flavor, use apple cider vinegar or white vinegar. For a slightly milder taste, reduce the vinegar to 1/3 cup and add a little extra water.
You can add thinly sliced bell peppers for color and crunch. Fresh parsley, dill, or basil can be used instead of mint. For a less sweet version, reduce the sugar to 2 tablespoons.
For extra freshness, add a squeeze of lemon juice just before serving. You can also use cherry tomatoes cut in half if you prefer smaller tomato pieces.
Storage/Reheating
Store leftovers in an airtight container in the refrigerator for up to 3 days. Stir before serving because the dressing may settle at the bottom.
This salad should not be reheated. It is meant to be served cold. The vegetables will soften the longer they sit, so it is best enjoyed within the first 24 to 48 hours.
FAQs
Can I make this salad ahead of time?
Yes. This salad is perfect for making ahead because the vegetables need time to marinate. Prepare it at least 2 hours before serving.
Can I leave the cucumber peel on?
Yes. You can leave the peel on if the cucumbers are tender and not waxy. Peeling gives the salad a softer texture.
What kind of vinegar should I use?
White vinegar gives a classic sharp flavor, while apple cider vinegar adds a slightly fruity taste.
Can I use less sugar?
Yes. Reduce the sugar to 2 tablespoons for a less sweet marinade.
Can I use red onion?
Yes. Red onion works well and adds color, but it has a stronger flavor than yellow or white onion.
How long should the salad marinate?
At least 2 hours is best. Longer chilling gives the vegetables more flavor.
Can I add more tomatoes?
Yes. Add an extra tomato if you want the salad to be juicier and more tomato-forward.
Is this salad served cold?
Yes. It tastes best chilled straight from the refrigerator.
Can I use dried mint?
Yes, but use only a small pinch because dried mint has a stronger flavor than fresh mint.
Why is my salad watery?
Tomatoes and cucumbers naturally release liquid as they sit. Stir before serving to mix the juices back into the marinade.
Conclusion
Marinated cucumbers, onions, and tomatoes is a simple, refreshing side dish with crisp texture and bright flavor. The easy vinegar marinade turns everyday vegetables into a chilled salad that is perfect for preparing ahead. Serve it cold and enjoy its tangy, lightly sweet taste with your favorite meals.
Marinated Cucumbers, Onions, and Tomatoes is a crisp and refreshing salad made with fresh vegetables soaked in a tangy, lightly sweet vinegar dressing. Perfect for warm weather meals, potlucks, or simple family dinners, this chilled salad is easy to prepare and packed with bright flavor.
Author:Sophia
Prep Time:10 minutes
Cook Time:0 minutes
Total Time:2 hours 10 minutes
Yield:6 side-dish servings
Category:Salad
Method:No-Cook
Cuisine:American
Diet:Vegan
Ingredients
3 medium cucumbers, peeled and sliced 1/4 inch thick
1 medium onion, thinly sliced and separated into rings
3 medium tomatoes, cut into wedges
1/2 cup vinegar
1/4 cup granulated sugar
1 cup cold water
2 teaspoons salt
1 teaspoon fresh coarse ground black pepper
1/4 cup oil
1 teaspoon chopped fresh mint (optional)
Instructions
Place the sliced cucumbers, onion rings, and tomato wedges into a large mixing bowl.
Add the vinegar, sugar, cold water, salt, black pepper, and oil to the bowl.
Sprinkle in the chopped fresh mint if using.
Gently toss everything together until the vegetables are evenly coated in the marinade.
Cover the bowl and refrigerate for at least 2 hours.
Stir once halfway through chilling so the vegetables absorb the dressing evenly.
Serve cold with extra marinade spooned over the top.
Notes
This salad tastes even better after several hours of chilling.
Use apple cider vinegar for a slightly sweeter and fruitier flavor.
Cherry tomatoes can be substituted for regular tomatoes.
Fresh dill, parsley, or basil can replace mint.
Store leftovers in the refrigerator and stir before serving.
