Salads
This Biaggi's cucumber onion salad recipe delivers the perfect balance of bright, crisp vegetables and tangy vinegar-kissed freshness that elevates any meal. 💛 The secret lies in the precise ratio of thinly sliced cucumbers and sharp red onions, tossed with a simple yet bold dressing that cuts through the richness of grilled meats or pairs beautifully with fresh bread.
I've perfected this salad over years of testing, ensuring every bite has that signature crunch and refreshing zing that makes it a restaurant favorite.
The magic happens with the preparation—thinly slicing the cucumbers and onions by hand creates maximum surface area for flavor absorption, while the dressing (a blend of white wine vinegar, olive oil, Dijon mustard, and fresh herbs) adds just the right amount of tang and depth.
This salad comes together in just 15 minutes, making it ideal for weeknight dinners or last-minute appetizers. The key is letting it rest for a few minutes before serving to allow the flavors to meld perfectly.
What you'll end up with is a salad that's vibrant, refreshing, and packed with texture—crisp cucumbers, sharp onions, and a dressing that's light yet flavorful. It's the kind of dish that transforms a simple meal into something special, whether served alongside grilled chicken, fish, or as a standalone starter.
The simplicity of the ingredients doesn't compromise on flavor; instead, it highlights the natural freshness of the vegetables.
For added versatility, you can adjust the dressing to suit your taste—more vinegar for extra tang, a touch of honey for sweetness, or fresh dill for an herbaceous note.
This salad is not only delicious but also incredibly adaptable, making it a go-to recipe for any occasion. Let's get started on creating this bright, crunchy masterpiece!
Ingredients for biaggi's cucumber onion salad
Fresh cucumbers, sharp onions, and a tangy dressing that's all about balance and crunch.
| Ingredient | Amount | Notes |
|---|---|---|
| Persian Cucumbers 🥒 | 2 whole | Thinly sliced lengthwise |
| Red Onions 🧅 | 1 medium | Thinly sliced, white part only |
| Extra-Virgin Olive Oil 🫒 | ½ cup | Light, fruity variety preferred |
| White Wine Vinegar 🍷 | ¼ cup | Dry, crisp vinegar |
| Dijon Mustard 🌶️ | 1 tbsp | Mild or hot variety |
| Fresh Dill 🌿 | ¼ cup | Chopped, stems removed |
| Salt 🧂 | ½ tsp | Diamond Crystal preferred |
| Black Pepper 🌶️ | ¼ tsp | Freshly ground preferred |
| Granulated Sugar 🍚 | 1 tsp | Adjust to taste |
| Fresh Lemon Juice 🍋 | 1 tbsp | Freshly squeezed |
The cucumbers are everything here—Persian cucumbers are ideal because they're seedless and slice thinly for maximum crunch. Trader Joe's or your local farmers market are the best spots for them. Red onions add the bite, but if you prefer milder flavor, swap in yellow onions. The key is slicing them paper-thin—a mandoline makes this task effortless, but a sharp knife works too. Look for onions with crisp, firm layers and no soft spots. If you're using regular grocery store cucumbers, peel them first to avoid bitterness from the skin.
No white wine vinegar? Apple cider vinegar works in a pinch, though it's slightly sweeter. Fresh dill is non-negotiable for that signature flavor, but if you're out, dried dill at one-third the amount gets you close. The Dijon mustard adds depth—Maille brand is my go-to, but any quality jarred mustard works. Want to sweeten it up? A touch of honey (about 1 tsp) can replace the sugar. For extra zing, add a pinch of red pepper flakes. The dressing ratio is important: if you want it tangier, add more vinegar; creamier, add a splash of water.
This salad tastes even better after it rests for 15-20 minutes—the flavors meld beautifully. Store leftovers in an airtight container with a paper towel pressed on top to keep them crisp. Keeps for 2 days in the fridge. The dressing separates if stored separately, so shake it up before using. For a restaurant-style presentation, arrange the slices on a platter and drizzle the dressing artistically over the top. If you're prepping ahead, slice the veggies and store them separately until ready to toss.
Why You'll Love This Recipe
- No-Fuss Assembly: I swear, this salad takes five minutes—just thinly slice the cucumbers, halve the onions, and toss with the dressing. No peeling, no seeds, no fuss. The Persian cucumbers stay crisp even when prepped ahead, so you’re basically getting a head start on dinner.
- Tangy Crunch Magic: That white wine vinegar and Dijon mustard combo? Chef’s kiss. The vinegar cuts through the sweetness of the red onions while the mustard adds a little depth—bright, sharp, and just salty enough to make you want to eat it straight from the bowl. (Yes, I’ve done it.)
- Picnic or Potluck Hero: Between us, this salad is my go-to for anything—summer BBQs, lazy Sunday brunches, or even as a side when I’m roasting chicken. It travels well (no wilting here), keeps for days in the fridge, and honestly? People always ask for the recipe.
- Budget Brightener: Persian cucumbers and red onions are cheap, but they feel fancy. A little olive oil and vinegar stretch to dress four servings, and the mustard? That’s the secret weapon that makes it taste like you spent hours. My wallet and my taste buds win.
Step-by-step instructions for Biaggi's cucumber onion salad
Here's how to assemble this refreshing salad with perfect balance and texture every time.
🥘 Step 1: Prep the Vegetables with Precision
Start by washing the 2 whole Persian cucumbers thoroughly and patting them completely dry with paper towels. Using a sharp mandoline or very sharp knife, slice them lengthwise into ¼-inch thick strips. I like to work with one cucumber at a time to prevent browning—keep the cut pieces in a colander of ice water while you finish the second cucumber. This keeps them crisp and prevents them from turning rubbery.
Next, peel the 1 medium red onion and slice it lengthwise into quarters. Remove the root end and outer papery skin, then slice each quarter into thin strips, keeping only the white part. Soak these onion slices in a bowl of ice water for 5 minutes to mellow their sharpness. Drain well before using—this step makes all the difference in preventing a bite that's too harsh.
👨🍳 Step 2: Whisk the Dressing to Perfection
In a medium bowl, combine the 0.5 cup extra-virgin olive oil, 0.25 cup white wine vinegar, 1 tbsp Dijon mustard, 1 tbsp fresh lemon juice, 1 tsp granulated sugar, 0.5 tsp salt, and 0.25 tsp black pepper. Whisk vigorously for 1-2 minutes until the sugar dissolves completely and the mixture emulsifies into a smooth, glossy dressing. The sugar helps balance the acidity while the mustard adds depth—don't skip this step.
Taste the dressing before adding the vegetables. It should be tangy but not overly sharp, with just a hint of sweetness. If it needs more acidity, add another ½ teaspoon of vinegar. If it's too sharp, add a pinch more sugar. The dressing should coat the back of a spoon without being too thick—this ensures perfect coverage of the vegetables without making them soggy.
🥘 Step 3: Combine and Toss Gently
In a large serving bowl, combine the drained cucumber slices and onion strips. Pour the dressing over the vegetables and gently toss with your hands or a large spoon, being careful not to bruise the delicate cucumbers. I like to work in batches if the salad is very large—this ensures even coating without over-handling, which can make the cucumbers release excess water and dilute the dressing.
Sprinkle the 0.25 cup chopped fresh dill evenly over the salad and toss one final time. The dill should be distributed throughout, not just on top. Let the salad sit at room temperature for 10-15 minutes before serving—this allows the flavors to meld and the dressing to penetrate the vegetables completely. The cucumbers should be evenly coated with dressing but still hold their shape.
⏰ Step 4: Serve Immediately for Peak Freshness
Transfer the salad to a platter or individual bowls and serve immediately. The ideal serving temperature is room temperature—this enhances the crispness of the vegetables and allows the flavors to shine. If you need to prepare it ahead, assemble the salad up to 2 hours in advance and refrigerate, but toss with the dressing just before serving to maintain the perfect texture.
Garnish with an additional sprinkle of fresh dill and a few extra cucumber slices if desired. This salad pairs beautifully with grilled meats, fresh bread, or as a light lunch on its own. The key to its success lies in the balance of bright, tangy dressing and the crisp, fresh vegetables—each bite should be refreshing without being overpowering.
Pro Tips For Making Biaggi'S Cucumber Onion Salad
- SOAK ONIONS 15 MINUTES: I learned this the hard way—skipping the soak makes the red onion bite through the whole salad. Thinly slice the onion, toss it in a bowl of ice water for 15 minutes, then drain. The acid in the dressing won’t overpower that sharpness if you do this step.
- SLICE CUCUMBERS THICK: Thin slices turn to mush in this dressing. Cut Persian cucumbers into ¼-inch thick half-moons—thick enough to hold shape but still bright and crisp. (Yes, even if you’re impatient like me.)
- WHISK MUSTARD FIRST: Mix the Dijon with the vinegar and olive oil before adding the onions and cucumbers. This emulsifies the dressing instantly, so you’re not left with a sad, separated mess. Stir it like you mean it—no half-hearted whisking.
- LEAVE IT AT ROOM TEMP: Cold cucumbers and onions make the dressing clump into a weird, watery sludge. Take everything out of the fridge 10 minutes before assembling. The salad will come together smoother, and the flavors will meld better. (Your future self will thank you.)
Flavor customization for this recipe
Herb Variations
Swap the fresh dill for other herbs to match your flavor profile. Try flat-leaf parsley for a milder, brighter note—use 0.3 cup chopped instead. For a Mediterranean twist, add 0.25 cup chopped mint and reduce the dill to 0.1 cup.
Both herbs work beautifully but require adjusting the quantity to avoid overpowering the delicate cucumber and onion flavors. 🌿
Sweet-Tart Balance
Adjust the sweetness to your preference by modifying the sugar or adding honey. For a more pronounced sweet-tart contrast, replace the 1 tsp granulated sugar with 1 tsp honey or 1 tsp maple syrup.
If you prefer a sharper bite, omit the sugar entirely and add ½ tsp lemon zest to the dressing for added brightness. Taste as you go—this salad thrives on customization!
Spicy Kick
Add heat with red pepper flakes or fresh chili. For a subtle warmth, sprinkle ¼ tsp red pepper flakes into the dressing. For a bolder kick, finely mince 1 small jalapeño (seeds removed) and mix it into the dressing.
If you love spice, add a pinch of cayenne pepper along with the black pepper. Always taste first—spicy elements can quickly overpower the delicate cucumbers.
Citrus Twist
Brighten the salad with extra citrus beyond lemon juice. Add 1 tbsp orange juice or 1 tsp lime juice to the dressing for a tropical twist. Zest from the citrus (about 1 tsp orange or lime zest) adds aromatic depth.
This works especially well if you're serving the salad as a standalone dish or with seafood. The citrus enhances the vinegar’s acidity while adding a refreshing complexity. 🍊
Umami Depth
For a savory twist, incorporate umami-rich ingredients. Stir 1 tsp soy sauce or ½ tsp fish sauce into the dressing for a subtle depth. Alternatively, add 1 tbsp capers or 1 anchovy fillet (finely chopped) to the dressing—both add a briny, complex flavor that pairs wonderfully with the crisp vegetables.
These additions elevate the salad to restaurant-quality sophistication.
Texture Play
Enhance the salad’s texture with crunchy or creamy additions. Toss in ¼ cup toasted pine nuts or 2 tbsp chopped walnuts for crunch. For creaminess, fold in 2 tbsp crumbled feta cheese or 1 tbsp Greek yogurt into the dressing.
These additions add layers of contrast—crunch against the soft cucumbers or creaminess to balance the sharp onions. Experiment to find your favorite texture combo!
Nutrition facts
Frequently asked questions
Can I use regular cucumbers instead of Persian cucumbers?
You can, but Persian cucumbers are ideal because they're seedless and slice thinner for maximum crunch. If using regular cucumbers, peel them first to remove any bitter skin. For best results, slice them ⅛-inch thick instead of the ¼-inch called for with Persian cucumbers.
How do I make the onions less sharp?
Soak the sliced onions in ice water for 5-10 minutes before using—this mellows their bite significantly. Drain well before tossing with the salad. For even milder flavor, use yellow onions instead of red. The soaking works best with thin slices, so slice them paper-thin first.
Can I make this salad ahead of time?
Yes, but prepare it in stages. Slice the vegetables and store them separately in airtight containers with paper towels to absorb moisture. Store the dressing separately. When ready to serve, toss everything together and let it sit for 15 minutes before serving. The salad keeps well for 2 days in the fridge this way.
What's the best way to store leftovers?
Transfer the salad to an airtight container and press a paper towel on top to absorb excess moisture. This prevents sogginess and keeps the cucumbers crisp. Store for up to 2 days in the refrigerator. For best texture, toss with fresh dressing just before serving.
Can I adjust the dressing ratio for a creamier texture?
Yes! For a creamier dressing, add 1 tbsp Greek yogurt or 1 tbsp mayonnaise to the dressing while whisking. Start with small amounts—too much will make the salad soggy. The original ratio works best for the signature crisp texture, but this modification adds richness that pairs well with heartier main dishes.