A Timeless Summer Favorite
Marinated Cucumber, Tomato & Onion Salad is one of those dishes that transcends cultures and borders. My grandmother used to make it with cucumbers fresh from her garden, letting them soak in a tangy vinaigrette until every bite was infused with summer brightness. Whether you’re in the American South, the Mediterranean coast, or a quiet countryside village, there’s a version of this salad being served somewhere—cool, crunchy, and bursting with flavor.
This recipe is simple yet magical: crisp cucumbers, juicy tomatoes, and sharp onions come together in a light vinegar-based marinade that transforms everyday ingredients into something extraordinary. It’s the perfect side dish for picnics, potlucks, or backyard barbecues. Bonus: it’s vegan, gluten-free, and only gets better the longer it sits!
Why You’ll Love This Marinated Cucumber, Tomato & Onion Salad
- No cooking required – Just slice, mix, and chill
- Perfect for hot weather – Refreshing and hydrating
- Make-ahead friendly – Tastes better after a few hours
- Globally inspired – Found in many cultures from Europe to Asia
- Versatile – Great as a side, appetizer, or topping

🧅 Ingredients (Serves 7)
- 2 large cucumbers, thinly sliced (peeled or unpeeled)
- 3 medium tomatoes, chopped or sliced
- 1 large red onion, thinly sliced
- 1/4 cup white or apple cider vinegar
- 2 tablespoons olive oil
- 1 tablespoon sugar (adjust to taste)
- 1 teaspoon salt
- 1/2 teaspoon freshly ground black pepper
- 1 teaspoon dried oregano or fresh herbs like dill, parsley, or basil
- Optional: crushed red pepper, garlic, or feta cheese
⏱ Prep Time
- Prep Time: 15 minutes
- Marinating Time: 1–2 hours (overnight for maximum flavor)
- Total Time: 15 minutes active + chill time

Marinated Cucumber, Tomato & Onion Salad – A Summer Classic Bursting with Flavor
- Total Time: 15 minutes active, 2 hours total
- Yield: 1 large bowl of salad 1x
- Diet: Halal
Description
Description
This refreshing salad features crisp cucumbers, juicy tomatoes, and tangy onions soaked in a light vinegar marinade. Perfect for summer!
Ingredients
Ingredients:
- 2 large cucumbers, thinly sliced
- 3 medium tomatoes, chopped or sliced
- 1 large red onion, thinly sliced
- 1/4 cup white or apple cider vinegar
- 2 tablespoons olive oil
- 1 tablespoon sugar (adjust to taste)
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 teaspoon dried oregano or fresh herbs (dill, parsley, basil)
- Optional: crushed red pepper, garlic, or feta cheese
Instructions
Instructions:
- Slice cucumbers and onions thinly. Chop tomatoes. Place in a large bowl.
- In a separate bowl or jar, whisk together vinegar, olive oil, sugar, salt, pepper, and herbs.
- Pour marinade over vegetables. Toss well to coat.
- Cover and refrigerate for 1–2 hours, or overnight for best flavor.
- Stir before serving. Use a slotted spoon to dish up. Garnish with extra herbs or feta if desired.
Notes
Notes:
- Use cherry or Roma tomatoes for less moisture and better texture.
- If your cucumbers are particularly seedy, scoop out the centers before slicing.
- Add garlic or red pepper flakes for extra kick.
- This salad is naturally gluten-free, vegan, and low-calorie.
- Prep Time: 15 minutes
- Cook Time: 0 minutes
- Category: Salad, Side Dish, Summer Recipes
- Method: Sarah
- Cuisine: American
Nutrition
- Serving Size: Approximately 1 cup per serving
- Calories: 70
- Sugar: 3g
- Sodium: 240mg
- Fat: 5g
- Saturated Fat: 1g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 6g
- Fiber: 1g
- Protein: 1g
- Cholesterol: 0mg
🥄 How to Make Marinated Cucumber, Tomato & Onion Salad
Step 1: Prep the Vegetables
Thinly slice the cucumbers and onions. Chop or slice the tomatoes. Place them all in a large bowl.
Step 2: Mix the Marinade
In a small bowl or jar, whisk together vinegar, olive oil, sugar, salt, pepper, and herbs. Taste and adjust sugar or salt based on the acidity of your vinegar.
Step 3: Combine and Toss
Pour the marinade over the vegetables and toss well to combine. Ensure everything is coated.
Step 4: Marinate and Chill
Cover the bowl and refrigerate for at least 1 hour. Stir occasionally to redistribute the marinade.
Step 5: Serve
Serve chilled with a slotted spoon. Garnish with extra herbs or feta if desired.
💡 Tips for the Best Marinated Salad
- Use ripe, firm tomatoes – cherry or Roma work beautifully.
- Red onions provide a milder bite, but yellow onions work in a pinch.
- For crunchier cucumbers, don’t marinate too long.
- Balance is key – adjust sugar or salt to taste.
- Add a pinch of red pepper for heat or crushed garlic for depth.
❄️ Storage Tips
- Refrigerator: Store in an airtight container for up to 3 days.
- Don’t freeze – the vegetables will become mushy.
- Best served fresh or after a few hours of marinating.
🌍 Cultural Notes & Variations
1. Greek-Style
Add Kalamata olives, crumbled feta, and oregano for a Horiatiki-inspired version.
2. Eastern European-Style
Use dill and apple cider vinegar, sometimes with a touch of sour cream.
3. Asian-Inspired
Swap vinegar for rice vinegar, add sesame oil, and sprinkle with toasted sesame seeds.
4. Southern U.S. Style
Use white vinegar, more sugar, and even add a few banana pepper slices for a tangy kick.
🍽 What to Serve with Marinated Cucumber, Tomato & Onion Salad
Mains:
- Grilled chicken, steak, or fish
- Burgers and barbecue
- Tofu or veggie skewers for plant-based options
Sides:
- Corn on the cob
- Pasta salad
- Crusty bread or pita for dipping into the marinade
Drinks:
- Iced tea
- Lemonade
- Light white wine or sparkling water with citrus