Salads
Biaggi's cucumber onion salad delivers the perfect balance of crisp texture and bright, zesty flavors—a dish that elevates any meal with its refreshing crunch and tangy herb vinaigrette. The secret lies in thinly sliced cucumbers and onions, tossed with fresh herbs and a sharp dressing that keeps everything vibrant.
This recipe transforms simple ingredients into a restaurant-worthy side that pairs beautifully with grilled meats or crusty bread.
The salad’s signature technique involves chilling the mixture for at least 30 minutes before serving, allowing the flavors to meld and the onions to soften just enough without losing their bite.
A light drizzle of olive oil and a squeeze of lemon ensure the dressing clings to every slice, creating a harmonious bite. The addition of celery crowns adds an extra layer of texture, making this salad both visually appealing and irresistibly crisp.
What makes this dish truly special is its versatility—it works as a standalone appetizer, a refreshing side, or even a light lunch when paired with protein.
The dressing, made with fresh dill, parsley, and a touch of garlic, brightens the salad while complementing the natural sweetness of the cucumbers and onions. Every component comes together effortlessly, yet the result is anything but basic.
For an added touch of elegance, garnish with extra herbs or a sprinkle of flaky sea salt before serving. This salad is best enjoyed chilled, making it ideal for summer gatherings or weeknight dinners. Let’s bring Biaggi’s signature freshness to your table with this foolproof recipe.
Ingredients for biaggi's cucumber onion salad
Thinly sliced cucumbers, crisp onions, and celery crowns meet a bright herb vinaigrette for Biaggi's signature summer salad.
| Ingredient | Amount | Notes |
|---|---|---|
| Persian Cucumbers 🥒 | 2 whole | Thinly sliced lengthwise, seeds removed |
| Yellow Onions 🧅 | 1 whole | Thinly sliced, soaked in cold water |
| Celery Crowns 🥬 | 1 cup | Thinly sliced crosswise, crisp |
| Fresh Dill 🌿 | ¼ cup | Chopped, stems removed |
| Fresh Parsley 🌿 | ¼ cup | Chopped, flat-leaf preferred |
| Extra-Virgin Olive Oil 🫒 | ½ cup | Light, fruity variety |
| Fresh Lemon Juice 🍋 | ¼ cup | Strained, freshly squeezed |
| Garlic Cloves 🧄 | 2 cloves | Minced, fresh preferred |
| Flaky Sea Salt 🧂 | 1 tsp | Maldon preferred for garnish |
| White Wine Vinegar 🍷 | 2 tbsp | Dry variety, chilled |
| Honey 🍯 | 1 tbsp | Light, for balance |
| Black Peppercorns 🌶️ | ¼ tsp | Freshly cracked |
The cucumbers and onions are the stars here—Persian cucumbers stay crispest when sliced lengthwise, and yellow onions should be thinly shaved and soaked in cold water for 10 minutes to mellow their bite. Celery crowns add that signature crunch; look for stalks with vibrant green leaves at Whole Foods or Trader Joe's for the freshest texture. The herbs—fresh dill and parsley—should be bright green with no wilting; if they're past their prime, dried oregano at half the amount will work in a pinch, though fresh is ideal for that restaurant-quality flavor. Extra-virgin olive oil matters here too; opt for a light, fruity variety like Colavita or Bertolli to avoid overpowering the delicate flavors.
No fresh dill? Fresh tarragon or chives can substitute at the same amount, though the flavor profile shifts slightly. Running short on vinegar? Lemon juice alone works, but the acidity needs balancing—add an extra teaspoon of honey. The garlic can be roasted for a milder sweetness if you prefer, though fresh minced garlic delivers the sharp bite Biaggi's version is known for. For the onions, if you forget to soak them, a quick rinse under cold water before tossing with the dressing helps. The honey is key for balancing the vinegar's sharpness; if you're avoiding sugar, a splash of agave nectar works equally well.
This salad thrives when prepped ahead—chill for at least 30 minutes before serving to let flavors meld. Store the dressing separately if prepping early; toss just before serving to maintain crispness. The cucumbers and celery will keep for 3-4 days in the fridge, while the onions stay fresh for 5-6 days if stored in a sealed container with a paper towel to absorb moisture. The dressing keeps for up to 1 week in the fridge, though it's best used within 3-4 days for peak freshness. Garnish with flaky sea salt right before serving to preserve that restaurant-fresh crunch.
Why You'll Love This Recipe
- No-Chop Trick: Honestly, I swear by the quick soak-and-drain method for the onions—just slice them thin, toss in ice water for 10 minutes, then drain. That sharp bite softens just enough to balance the crisp Persian cucumbers without making me cry. (Between us, my eyes still water when I dice raw onions, but this? Zero tears.)
- Herb-Packed Punch: The dill and parsley here aren’t just garnish—they’re the stars. Freshly chopped, they release that bright, citrusy aroma the second you mix them in, and that celery crown? It adds this weirdly satisfying crunch that keeps you reaching for more. (Yes, even on a Tuesday night.)
- Lunchbox Legend: I make this in big batches on Sundays because it’s the only salad my kids won’t trade for chips. Pack it in mason jars with the dressing on the bottom, and it stays fresh for days—no sad wilted lettuce here. Honestly, it’s my go-to for school lunches, potlucks, or just because.
- Dollar Stretch: Persian cucumbers and fresh herbs might sound fancy, but they’re actually budget-friendly if you buy in season. A single bunch of dill lasts me weeks, and yellow onions keep forever. Plus, this salad stretches a little dressing a long way—perfect for when you’re trying to feed a crowd without breaking the bank.
Step-by-step instructions for Biaggi's cucumber onion salad
Master this refreshing salad with precise prep and vibrant vinaigrette techniques.
Prepare the Vegetable Base
Begin by thinly slicing the 2 whole Persian cucumbers lengthwise, removing seeds with a spoon to prevent bitterness. Cut the 1 whole yellow onion into thin slices and immediately soak in cold water for 10 minutes to mellow their sharpness. Drain well before using.
Next, slice the 1 cup celery crowns crosswise into thin, crisp pieces. Arrange all prepared vegetables on a platter, ensuring even distribution. The celery should remain separate from the cucumbers and onions to maintain distinct textures in each bite.
Create the Herb Vinaigrette
In a small bowl, whisk together the 0.5 cup extra-virgin olive oil, 0.25 cup fresh lemon juice, 2 tbsp white wine vinegar, and 1 tbsp honey until fully emulsified. This balance of acidity and sweetness forms the foundation of the dressing.
Add the minced 2 cloves garlic, chopped 0.25 cup fresh dill, and 0.25 cup fresh parsley, stirring gently to incorporate. Finish with the 0.25 tsp freshly cracked black peppercorns. The vinaigrette should coat a spoon with a silky consistency—if too thick, add 1 tsp water to achieve the perfect pour.
Combine and Season
Gently toss the drained vegetables with half of the vinaigrette, reserving the remainder for later. The key here is to work quickly but carefully to avoid bruising the delicate celery and cucumbers. Taste and adjust seasoning with the 1 tsp flaky sea salt, adding more if needed for a proper salt-to-acid balance.
Let the salad rest for 15 minutes before serving. This brief waiting period allows the flavors to meld while maintaining the vegetables' crisp texture. The onions should now be subtly sweet, the cucumbers refreshingly cool, and the celery providing a satisfying crunch.
Final Assembly and Presentation
Arrange the salad on chilled plates, drizzling with the reserved vinaigrette just before serving. The dressing should glisten slightly, indicating proper emulsification. Sprinkle with an additional pinch of flaky sea salt and a few extra dill sprigs for visual appeal and flavor enhancement.
Serve immediately to preserve the vegetables' crispness and the vinaigrette's vibrant color. This salad pairs perfectly with grilled proteins or as a standalone summer dish, offering a refreshing contrast of textures and flavors in every bite.
Pro Tips For Making Biaggi'S Cucumber Onion Salad
- CHILL THE ONIONS FIRST: I learned this the hard way—slicing raw yellow onions for this salad makes the whole bowl taste bitter. Toss the sliced onions in ice water for 10 minutes before draining, or even better, soak them in cold water for 30 minutes. The crunch stays, but the sharpness mellows out perfectly for the bright, herby flavors.
- SLICE CUCUMBERS THINLY: This isn’t just about looks—thin, even slices (about ⅛-inch thick) let the dressing cling to every bite instead of pooling at the bottom. Use a sharp knife or a mandoline if you’re impatient, but don’t skip this step. Thick slices make the salad feel heavy; thin ones keep it fresh and light.
- SALT THE CELERY: Sounds weird, but it works: Sprinkle the chopped celery with a pinch of salt and let it sit for 5 minutes before mixing with the rest. This draws out moisture and softens the fibers just enough to balance the crunch of the cucumbers and onions—no mush, just a smoother texture.
- USE A LITTLE ACID: The original recipe probably calls for lemon juice, but I’ve found that adding 1 teaspoon of white wine vinegar (or even a splash of pickle brine) to the dressing makes the flavors pop. It cuts through the richness of the onions and keeps the herbs from getting lost in the mix. Trust me, it’s the thing that matters most.
Essential equipment for this recipe
Precision Cutting Tools
For this salad, a sharp mandoline slicer is my go-to for achieving those restaurant-quality thin slices—especially for the cucumbers and onions. I use the OXO Good Grips Mandoline because it’s sturdy and has adjustable thickness settings.
For the celery crowns, a sharp chef’s knife works best; I recommend the Wüsthof Classic 8-inch for clean, even cuts. 🔪
Mixing Essentials
A glass mixing bowl is ideal for combining the dressing ingredients because it lets you see the emulsification process clearly. I prefer a stainless steel whisk for blending the vinaigrette—it’s durable and won’t rust like plastic.
For tossing the salad, a large serving spoon with a flat edge helps distribute the dressing evenly without crushing the vegetables.
Storage Containers
If you’re prepping ahead, store the vegetables and dressing separately in airtight glass containers to maintain freshness. I use Pyrex glass containers with snap-on lids—they’re microwave-safe and keep everything crisp for up to 3-4 days.
For the dressing, a small mason jar works perfectly, and you can even shake it to re-emulsify before serving.
Garnishing Tools
A fine-mesh strainer is handy for rinsing the soaked onions and draining any excess water. For garnishing, I keep Maldon flaky sea salt in a small salt cellar on my counter—it’s easy to sprinkle without overdoing it.
A pair of tweezers also comes in handy for placing delicate dill sprigs on top of each serving for that restaurant touch. ✨
Optional Extras
If you want to add a pop of color, a zester works great for grating lemon zest into the dressing. For extra crunch, I sometimes toast pine nuts in a small skillet over medium heat until golden—just 2-3 minutes—and sprinkle them on top.
A microplane is also useful for grating garlic if you prefer a finer texture than mincing.
Nutrition facts
Frequently asked questions
Why soak the onions before slicing?
Soaking the thinly sliced yellow onions in cold water for 10 minutes removes excess sharpness while keeping them crisp. This step is key to achieving that perfect balance of sweetness and subtle bite that makes Biaggi's version stand out.
Can I substitute Persian cucumbers?
Yes! English cucumbers work in a pinch, but Persian cucumbers stay crispest due to their thinner skin and fewer seeds. If using English cucumbers, peel them first and pat dry thoroughly to prevent a watery salad.
How long can I make this ahead of time?
Prepare the vegetables and dressing separately up to 2 days ahead. Store in airtight containers in the fridge. Toss just before serving to maintain crispness. The dressing alone keeps for 1 week if stored properly.
What if I don't have fresh dill?
Use fresh tarragon or chives at the same amount for a similar freshness. In an absolute pinch, dried dill works at half the quantity, but fresh herbs deliver that signature bright flavor.
Is this salad gluten-free?
This recipe contains no gluten-containing ingredients. Just ensure your flaky sea salt is certified gluten-free if you're avoiding all traces. The natural ingredients make it perfectly safe for gluten-free diets.