If you’re craving a fresh, vibrant dish that bursts with color and flavor, the Cucumber and Tomato Salad with Red Onions Recipe is an absolute must-try. This salad perfectly balances crisp cucumbers, juicy tomatoes, and zesty red onions with a tangy, homemade vinaigrette that ties everything together beautifully. It’s a simple yet elegant salad that elevates any meal, whether served as a light lunch or a vibrant side dish. Once you try this recipe, it’ll quickly become your go-to for effortless, refreshing summer eating.
Ingredients You'll Need
The magic of this salad lies in its simplicity. Each ingredient is carefully chosen to create that perfect harmony of texture, flavor, and color. Freshness matters here, so try to pick the ripest tomatoes and the crunchiest cucumbers you can find.
- 3-4 ripe tomatoes: I love using heirloom tomatoes for their sweetness and vibrant colors.
- 3-4 Kirby cucumbers or 1 thin English cucumber: Their firm texture adds a refreshing crunch.
- ⅓ red onion (sliced thinly): Thin slices offer just the right sharp bite without overpowering the salad.
- 1 tablespoon fresh dill (or herb of your choice): Dill adds a bright, herby note that complements the vegetables beautifully.
- 2 tablespoon red wine vinegar: Gives the salad a pleasant tang that wakes up the palate.
- 3 tablespoon good quality extra virgin olive oil: I used unrefined olive oil for its rich, fruity depth.
- ½ teaspoon Dijon mustard (or multigrain mustard): Helps emulsify the dressing while adding a subtle kick.
- Salt to taste: Essential for bringing all the flavors together.
How to Make Cucumber and Tomato Salad with Red Onions Recipe
Step 1: Prepare the Vinaigrette
Start by combining your red wine vinegar, extra virgin olive oil, Dijon mustard, and a pinch of salt in a small mason jar. Seal the lid tightly and give it a good shake until the vinaigrette emulsifies. This simple dressing is the heart of the salad, blending tanginess and richness that make every bite sing.
Step 2: Slice the Vegetables Thinly
Using a mandolin or sharp knife, slice the cucumbers, tomatoes, and red onions into thin, even pieces. Thin slicing ensures the textures meld perfectly and every mouthful is balanced with the right amount of each ingredient. Plus, those delicate slices make the salad look like a work of art.
Step 3: Combine and Toss
Gently place all your sliced vegetables in a salad bowl and sprinkle with the fresh dill or your chosen herb. Drizzle 2 tablespoons of the vinaigrette over the top and toss carefully to avoid bruising the delicate slices. Taste and add more dressing as desired—you want just enough to lightly coat without drowning the fresh flavors.
Step 4: Serve Immediately
This salad is best served fresh to enjoy the crisp textures and vibrant flavors. Keep the remaining vinaigrette for another use—it's fantastic on roasted vegetables or grilled fish.
How to Serve Cucumber and Tomato Salad with Red Onions Recipe
Garnishes
Try adding a sprinkle of crumbled feta or goat cheese for a creamy contrast to the crisp veggies. A few fresh basil or mint leaves also add a lovely aromatic touch. For some extra crunch, toasted pine nuts or sunflower seeds work beautifully.
Side Dishes
This salad pairs wonderfully with grilled chicken, fish, or even a juicy steak. It also makes a refreshing counterpoint to richer dishes like creamy pasta or roasted meats. Its bright acidity is perfect for summer barbecues as a light side that complements smoky flavors.
Creative Ways to Present
Serve the salad in individual glass jars for a charming picnic-style presentation. Or layer it in a large clear bowl to show off the beautiful colors. A large wooden serving platter lined with fresh herbs underneath adds extra flair for entertaining guests.
Make Ahead and Storage
Storing Leftovers
If you have leftovers, store the salad in an airtight container in the refrigerator. It’s best enjoyed within 1-2 days, as the cucumbers and tomatoes can release water, making the salad a bit soggy.
Freezing
This salad is not suitable for freezing due to the high water content in cucumbers and tomatoes, which will become mushy upon thawing.
Reheating
Since this is a fresh, cold salad, it’s not meant to be reheated. Enjoy it chilled for the best flavor and texture experience.
FAQs
Can I use other types of vinegar in the salad?
Absolutely! While red wine vinegar adds a nice tang, apple cider vinegar or white balsamic can also work well and offer different flavor profiles.
What herbs can I substitute instead of dill?
Fresh parsley, basil, or mint are great alternatives. Each herb brings its own unique note, so feel free to experiment to match your taste.
How thin should I slice the vegetables?
A thickness of about ⅛ inch or less is ideal to keep the salad tender and easy to eat. A mandolin slicer makes this task quick and precise.
Can I add other vegetables to this salad?
Yes, adding thinly sliced bell peppers or radishes can introduce extra crunch and color, enhancing the salad’s appeal.
Is this salad suitable for meal prep?
This salad is best fresh but can be prepared a few hours ahead if kept chilled. Wait to add the dressing until just before serving for optimal texture.
Final Thoughts
I hope you’re as excited to make this Cucumber and Tomato Salad with Red Onions Recipe as I am to share it with you. It’s the kind of dish that feels effortless but delivers impressive freshness and flavor every time. Whether it's a casual weeknight dinner or a sunny weekend gathering, this salad will definitely brighten your table and your mood. Give it a try—you won’t regret adding this vibrant, crisp classic to your recipe repertoire!
PrintCucumber and Tomato Salad with Red Onions Recipe
A refreshing and simple cucumber and tomato salad featuring thinly sliced red onions and fresh dill, tossed in a tangy red wine vinegar and Dijon mustard vinaigrette. Perfect as a light side dish or an easy summer salad that comes together in just 10 minutes.
- Prep Time: 10 minutes
- Cook Time: 0 minutes
- Total Time: 10 minutes
- Yield: 4 servings
- Category: Salad
- Method: No-Cook
- Cuisine: American
- Diet: Vegetarian
Ingredients
Salad Ingredients
- 3-4 ripe tomatoes (preferably heirloom tomatoes)
- 3-4 Kirby cucumbers or 1 thin English cucumber
- ⅓ red onion (sliced thinly)
- 1 tbsp fresh dill (or herb of your choice)
Vinaigrette Dressing
- 2 tbsp red wine vinegar
- 3 tbsp good quality extra virgin olive oil (unrefined recommended)
- ½ tsp Dijon mustard (or multigrain mustard)
- Salt to taste
Instructions
- Prepare the Vinaigrette: In a small mason jar, combine the red wine vinegar, extra virgin olive oil, Dijon mustard, and salt. Put a lid on the jar and shake vigorously until the vinaigrette emulsifies into a smooth dressing.
- Slice the Vegetables: Using a mandolin or a sharp knife, thinly slice the cucumbers, tomatoes, and red onions to ensure even texture and ease of eating.
- Combine Ingredients: Place all the sliced vegetables in a salad bowl. Add fresh dill or your chosen herb on top for added flavor.
- Toss with Dressing: Start by adding 2 tablespoons of the vinaigrette to the salad and gently toss to coat all ingredients evenly, being careful not to tear the thin slices. Add more dressing if desired to taste.
- Serve: Serve the salad immediately for the freshest taste. Reserve any leftover vinaigrette for future use.
Notes
- Using heirloom tomatoes adds a lovely sweetness and vibrant color.
- Thin slicing is key to avoid overpowering the delicate textures.
- The salad is best eaten fresh but can be refrigerated for up to a day with dressing held separately.
- Feel free to substitute fresh dill with parsley, basil, or cilantro for a different herbaceous note.
- The vinaigrette can be adjusted to your taste by varying the amount of mustard or vinegar.

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