This marinated cucumber, onion, and tomato salad is a refreshing and vibrant dish perfect for any meal. The crispness of the cucumbers, the juiciness of the tomatoes, and the sharpness of the red onions come together beautifully with a simple yet flavorful dressing.
If you don't usually keep red wine vinegar or dried oregano in your pantry, you might need to pick these up at the supermarket. Red wine vinegar adds a tangy depth to the dressing, while dried oregano brings a hint of Mediterranean flavor.

Ingredients for Marinated Cucumber Onion and Tomato Salad
Cucumbers: Fresh and crisp, they add a refreshing crunch to the salad.
Tomatoes: Juicy and sweet, they provide a burst of flavor and color.
Red onion: Sharp and tangy, they add a nice bite and contrast to the other ingredients.
Olive oil: A rich and smooth oil that forms the base of the dressing.
Red wine vinegar: Adds a tangy and slightly sweet flavor to the dressing.
Dried oregano: Brings a hint of Mediterranean flavor to the salad.
Salt: Enhances the flavors of all the ingredients.
Black pepper: Adds a touch of heat and depth to the dressing.
Technique Tip for This Recipe
When slicing cucumbers, use a mandoline for uniform thickness, which ensures even marination. For the red onion, soak the slices in cold water for 10 minutes before adding to the salad to reduce their sharpness. When whisking the dressing, make sure to emulsify the olive oil and red wine vinegar thoroughly to create a well-blended mixture that coats the vegetables evenly.
Suggested Side Dishes
Alternative Ingredients
cucumbers - Substitute with zucchini: Zucchini has a similar texture and mild flavor, making it a good alternative in salads.
tomatoes - Substitute with bell peppers: Bell peppers add a sweet and crunchy element, providing a different but pleasant taste and texture.
red onion - Substitute with shallots: Shallots have a milder flavor and can offer a subtle sweetness that complements the other ingredients.
olive oil - Substitute with avocado oil: Avocado oil has a similar healthy fat profile and a mild flavor that works well in dressings.
red wine vinegar - Substitute with apple cider vinegar: Apple cider vinegar provides a tangy flavor that can mimic the acidity of red wine vinegar.
dried oregano - Substitute with dried basil: Dried basil offers a different but complementary herbaceous note that pairs well with the other ingredients.
salt - Substitute with soy sauce: Soy sauce adds a salty and umami flavor, enhancing the overall taste of the salad.
black pepper - Substitute with white pepper: White pepper has a similar spiciness but with a slightly different flavor profile, adding a unique twist.
Other Alternative Recipes Similar to This Salad
How to Store or Freeze This Salad
- Store the marinated cucumber onion and tomato salad in an airtight container to maintain its freshness and prevent any unwanted odors from seeping in.
- Place the container in the refrigerator. The salad will stay fresh for up to 3 days, allowing the vegetables to soak up the delicious flavors of the dressing.
- If you want to prepare the salad in advance, you can chop the cucumbers, tomatoes, and red onion and store them separately in airtight containers. Combine them with the dressing just before serving to keep the vegetables crisp.
- Avoid freezing this salad. The high water content in cucumbers and tomatoes makes them unsuitable for freezing, as they will become mushy and lose their texture upon thawing.
- If you have leftovers and want to repurpose them, consider adding them to a pasta salad or using them as a topping for grilled chicken or fish. The marinated flavors will enhance the overall dish.
- For an extra burst of flavor, you can add fresh herbs like basil or parsley just before serving. This will give the salad a fresh, vibrant taste even after being stored.
- Always use clean utensils when handling the salad to avoid contamination and extend its shelf life.
How to Reheat Leftovers
If you find yourself with leftover marinated cucumber onion and tomato salad, reheating might not be the best option. This salad is best enjoyed cold or at room temperature. However, if you prefer a warm version, consider these creative methods:
Warm Salad Toss:
- Heat a non-stick skillet over medium heat.
- Add the leftover salad to the skillet and toss gently for 2-3 minutes until just warmed through. Be careful not to overcook as the vegetables can become mushy.
Microwave Method:
- Place the salad in a microwave-safe dish.
- Cover with a microwave-safe lid or plastic wrap, leaving a small vent for steam to escape.
- Microwave on medium power for 30-45 seconds. Stir and check the temperature. Repeat if necessary, but avoid overheating.
Oven Method:
- Preheat your oven to 350°F (175°C).
- Spread the salad evenly on a baking sheet.
- Warm in the oven for about 5-7 minutes. This method helps maintain the texture of the vegetables.
Steaming:
- Use a steamer basket over boiling water.
- Place the salad in the basket and cover.
- Steam for 2-3 minutes until just warmed through. This method helps retain the crunchiness of the cucumbers and onions.
Sautéing:
- Heat a tablespoon of olive oil in a pan over medium heat.
- Add the salad and sauté for 2-3 minutes, stirring frequently.
- This method can add a slight caramelization to the onions and tomatoes, enhancing their flavors.
Remember, the key is to warm the salad gently to preserve its fresh and vibrant taste.
Best Tools for This Recipe
Large mixing bowl: Use this to combine the cucumbers, tomatoes, and red onion.
Small bowl: Use this to whisk together the olive oil, red wine vinegar, oregano, salt, and pepper.
Whisk: Essential for mixing the dressing ingredients thoroughly.
Cutting board: Provides a stable surface for slicing the cucumbers, chopping the tomatoes, and thinly slicing the red onion.
Chef's knife: Ideal for chopping tomatoes and slicing cucumbers and red onion.
Measuring cups: Necessary for measuring out the cucumbers and tomatoes.
Measuring spoons: Use these to measure the olive oil, red wine vinegar, oregano, salt, and pepper.
Refrigerator: Needed to marinate the salad for at least 30 minutes before serving.
Serving spoon: Useful for tossing the salad and serving it.
How to Save Time on Making This Salad
Prep ingredients ahead: Slice the cucumbers, chop the tomatoes, and thinly slice the red onion the night before.
Use a mandoline: A mandoline slicer can quickly and uniformly slice the cucumbers and red onion.
Make dressing in bulk: Prepare a larger batch of the olive oil, red wine vinegar, oregano, salt, and pepper dressing to use for future salads.
Marinate overnight: Allow the salad to marinate overnight for enhanced flavor, saving you time on the day of serving.

Marinated Cucumber Onion and Tomato Salad Recipe
Ingredients
Main Ingredients
- 2 cups Cucumbers, sliced
- 1 cup Tomatoes, chopped
- 1 cup Red onion, thinly sliced
- ¼ cup Olive oil
- 2 tablespoon Red wine vinegar
- 1 teaspoon Dried oregano
- ½ teaspoon Salt
- ¼ teaspoon Black pepper
Instructions
- In a large mixing bowl, combine cucumbers, tomatoes, and red onion.
- In a small bowl, whisk together olive oil, red wine vinegar, oregano, salt, and pepper.
- Pour the dressing over the vegetables and toss to coat evenly.
- Let the salad marinate in the refrigerator for at least 30 minutes before serving.
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