Marinated Cucumbers Onions and Tomatoes Recipe tastes crisp, tangy, a little sweet, and super refreshing, and it comes together in about 15 minutes of hands-on time plus a quick chill. This salad works for busy home cooks who want a fresh side dish that feels special without any fancy skills or equipment. I have eaten some version of this salad at every summer cookout of my life, and I still never skip it on my own table.
Why Make This Marinated Cucumbers Onions and Tomatoes Recipe at Home
You control the flavor, the crunch, and the sweetness, instead of guessing what sat in a deli case all day. Fresh cucumbers, juicy tomatoes, and sharp onions soak up a bright vinaigrette that tastes way better than anything from a bottle.
You also save money and use up produce that might sit in the crisper. This recipe works with basic pantry staples, scales easily, and tastes even better the next day, so it fits meal prep and last minute dinners.
“This Marinated Cucumbers Onions and Tomatoes Recipe tastes like summer in a bowl, stays crunchy, and disappears fast at every potluck I bring it to. ★★★★★”
Ingredients You Need
Produce
- 3 medium cucumbers, thinly sliced
- Use English or Persian cucumbers for fewer seeds and tender skin.
- If you use standard waxed cucumbers, peel them and scoop out big seeds.
- 3 medium tomatoes, cut into wedges or thick slices
- Roma or vine tomatoes hold shape best and do not get mushy as fast.
- 1 small red onion, very thinly sliced
- Yellow or sweet onion also works, but red onion gives nice color and bite.
- 2 cloves garlic, minced or grated
- Use jarred minced garlic in water as a shortcut, not garlic salt.
Marinade / Dressing
- 1/3 cup distilled white vinegar
- Apple cider vinegar gives a softer tang and slight fruit note.
- 3 tablespoons extra virgin olive oil
- Any neutral oil like avocado or canola works if you prefer a lighter taste.
- 2 tablespoons granulated sugar
- Use honey or agave if you avoid refined sugar, but start with 1 tablespoon and taste.
- 1 teaspoon kosher salt, plus more to taste
- 1/2 teaspoon freshly ground black pepper
- 1/2 teaspoon dried oregano or Italian seasoning
- 1/4 teaspoon red pepper flakes (optional, for a little heat)
- 2 tablespoons fresh herbs, chopped
- Fresh dill, parsley, or basil all taste great; use what you have.
Optional add-ins
- 1/2 green bell pepper, thinly sliced, for extra crunch
- 1 small jalapeño, seeded and thinly sliced, for more heat
- 1/4 cup crumbled feta or fresh mozzarella pearls, added right before serving
- 1 teaspoon Dijon mustard, whisked into the dressing for extra body
Pantry shortcuts & brand notes
- Use pre-sliced jarred banana peppers instead of fresh bell pepper for a tangy twist.
- Use a good-tasting olive oil that you enjoy on salads; I like California Olive Ranch or Kirkland Signature.
- Use dried herbs if you lack fresh; just cut the amount in half compared to fresh.
Equipment
- Large mixing bowl (glass or stainless steel)
- Small bowl or jar with lid for mixing the marinade
- Sharp chef’s knife or mandoline for thin slices
- Cutting board
- Measuring cups and spoons
- Tongs or a large spoon for tossing
- Plastic wrap or lid for chilling in the fridge
Tips & Mistakes
- Slice cucumbers and onions thin so they soak up the marinade quickly and stay pleasant to bite.
- Salt the cucumbers lightly and rest them 10 minutes, then pat dry, so they release extra water and do not water down the dressing.
- Use firm, ripe tomatoes; soft tomatoes turn to mush in the marinade.
- Add tomatoes closer to serving time if you plan to keep leftovers longer than 24 hours.
- Taste the marinade before you pour it on and adjust salt, sugar, and vinegar until it hits that sweet-tangy balance you like.
- Do not skimp on chilling time; give the salad at least 30 minutes in the fridge so the flavors settle and blend.
- Stir gently so you do not crush the tomatoes and cucumbers.
- Keep garlic modest; too much raw garlic can overpower the fresh vegetables.
- Use glass or stainless steel bowls; plastic can hold onion and vinegar smells.
- Do not freeze this salad; freezing ruins the texture and turns everything soggy.
How to Make Marinated Cucumbers Onions and Tomatoes Recipe
Step 1: Prep the vegetables
Wash cucumbers and tomatoes under cool water and dry them. Slice cucumbers into thin rounds, about 1/8 inch thick, and place them in a colander over the sink. Sprinkle a pinch of salt over the cucumber slices, toss, and rest them 10 minutes so they drop some water.
Slice tomatoes into wedges or thick slices, about 1/2 inch thick, so they hold shape. Peel the red onion, then slice it as thin as you can, either with a sharp knife or a mandoline. Mince or grate the garlic.
Step 2: Mix the marinade
In a small bowl or jar, add vinegar, olive oil, sugar, salt, black pepper, dried oregano or Italian seasoning, and red pepper flakes if you use them. Whisk or shake until the sugar dissolves and the mixture looks slightly thick and combined. Taste and adjust seasoning; add a pinch more sugar if it tastes too sharp or a splash more vinegar if you want more tang.
Stir in the chopped fresh herbs. Set the marinade aside while you finish the vegetables. This short rest lets the herbs and spices bloom in the liquid.
Step 3: Combine vegetables and marinade
Pat the salted cucumbers dry with a clean towel or paper towels, then place them in a large mixing bowl. Add the sliced tomatoes and red onion to the same bowl. Toss gently with your hands or tongs so the vegetables mix evenly.
Pour the marinade over the vegetables. Toss again until every slice looks coated and glossy. Taste one cucumber and one tomato and adjust salt or pepper as needed.
Step 4: Chill and marinate
Cover the bowl with plastic wrap or a lid. Place it in the fridge for at least 30 minutes, and up to 4 hours, so the vegetables soak up flavor. Toss the salad once halfway through chilling if you can, so the top pieces get as much marinade as the bottom.
If you plan to serve it the next day, keep the tomatoes separate and add them about 30 to 60 minutes before serving. This method keeps the tomatoes firmer and the salad less watery. Stir in any cheese or delicate add-ins right before you bring the bowl to the table.
Step 5: Taste and serve
Right before serving, give the salad a gentle toss. Taste again and adjust seasoning; a last pinch of salt or squeeze of lemon juice can wake everything up. Sprinkle a little extra fresh herb on top for color.
Serve the salad chilled or at cool room temperature. Spoon some of the marinade over each serving so every plate gets that tangy juice. Watch it vanish faster than the burgers.
Variations I've Tried
I swap the vinegar for rice vinegar and add a drizzle of soy sauce and sesame oil for a light Asian-style twist. I toss in chickpeas or white beans to turn this into a quick lunch that actually fills me up. I add sliced radishes and celery when I want extra crunch and a bit of peppery bite.
I sometimes use only cucumbers and onions when tomatoes feel out of season, and the salad still tastes great. I mix in crumbled feta, olives, and a pinch of dried oregano for a Greek-style version that pairs nicely with grilled chicken. I also tried a no-sugar version with just vinegar, olive oil, and a splash of orange juice, and it tasted bright and fresh.
How to Serve Marinated Cucumbers Onions and Tomatoes Recipe
Serve this salad as a side with grilled chicken, steak, pork chops, or simple roasted fish. Spoon it over a bowl of warm rice or quinoa for a light, veggie-forward meal. Pile it next to burgers, hot dogs, or veggie patties at cookouts, and watch people go back for seconds.
Use leftovers as a crunchy topping for hummus toast or avocado toast. Pack it in lunch boxes with grilled meat, hard-boiled eggs, or a simple sandwich, and you get a fresh, juicy contrast to heavier items.
How to store
- Store leftovers in an airtight container in the fridge for up to 3 days; the cucumbers soften slightly each day but still taste good.
- Keep tomatoes separate if you can when you plan ahead, and mix them in a few hours before serving for the best texture.
- Skip the freezer; freezing ruins the crisp texture of cucumbers and tomatoes.
- Serve leftovers cold straight from the fridge, or let the salad sit on the counter 10 to 15 minutes to take the chill off before eating.
Marinated Cucumbers Onions and Tomatoes Recipe
Ingredients
Instructions
- Wash the cucumbers and tomatoes and pat dry. Slice the cucumbers into thin rounds, about 1/8 inch thick, and place them in a colander set over the sink. Sprinkle lightly with a pinch of salt, toss, and let rest for 10 minutes so they release some water.
- Cut the tomatoes into wedges or thick slices, about 1/2 inch thick, so they hold their shape. Peel the red onion and slice it very thinly. Mince or grate the garlic.
- In a small bowl or jar, combine the vinegar, olive oil, sugar, 1 teaspoon kosher salt, black pepper, dried oregano or Italian seasoning, and red pepper flakes if using. Whisk or shake until the sugar dissolves and the mixture is well combined. Taste and adjust the seasoning with more sugar or vinegar as needed, then stir in the chopped fresh herbs.
- Pat the cucumbers dry with a clean towel or paper towels and place them in a large mixing bowl. Add the tomatoes and sliced red onion. Toss gently to combine.
- Pour the marinade over the vegetables and toss gently until everything is evenly coated. Taste a cucumber and a tomato slice and adjust the salt or pepper if needed.
- Cover the bowl and refrigerate for at least 30 minutes, and up to 4 hours, to let the vegetables marinate and absorb the flavors. Toss once during chilling if possible so all the vegetables spend time in the marinade.
- Before serving, give the salad a gentle toss and taste once more, adding a pinch of salt or a squeeze of lemon juice if desired. Serve chilled or at cool room temperature, spooning some of the tangy marinade over each serving.
Notes
Approximate per serving (1/6 of recipe): 80–100 calories; fat 6 g; saturated fat 1 g; carbohydrates 8 g; fiber 1–2 g; sugars 6 g; protein 1–2 g; sodium 220 mg. Values will vary based on exact vegetable sizes, brands used, and any optional add-ins.
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