Classic Marinated Cucumber Tomato Onion Salad

If you’re looking for a fresh, healthy cucumber tomato onion salad, this classic marinated version is a must-try! Crisp cucumbers, juicy tomatoes, and sweet onions soak in a perfectly balanced tangy-sweet vinaigrette, creating a refreshing side dish that even salad skeptics love.

This easy marinated vegetable salad is perfect for summer, meal prep, BBQs, and quick weeknight dinners. Best of all, it tastes even better after chilling making it an ideal make-ahead recipe!

Why You’ll Love This Cucumber Tomato Salad

Quick & easy ready with simple pantry ingredients
Healthy & low-calorie packed with vitamins and hydration
Perfect for meal prep flavors improve over time
Versatile side dish pairs with chicken, fish, steak, or BBQ
Budget-friendly uses fresh, affordable vegetables

Ingredients for Marinated Cucumber Tomato Onion Salad

2 English cucumbers, thinly sliced

3 ripe tomatoes, chopped

1 small sweet onion (thinly sliced)

1 tsp kosher salt (divided)

1/2 tsp black pepper

1/4 tsp garlic powder

1/4 tsp dried oregano

1/4 tsp dried basil

1/4 cup white wine vinegar (or apple cider vinegar)

2 tbsp red wine vinegar

1 tbsp fresh lemon juice (optional)

3 tbsp sugar (adjust to taste)

1/4 cup extra-virgin olive oil

2 tbsp neutral oil

Fresh parsley (optional, for garnish)

How to Make Cucumber Tomato Onion Salad

Prepare the Vegetables

Slice cucumbers into thin rounds, chop tomatoes into bite-size pieces, and slice onions very thinly. This helps the vegetables absorb the marinade better while keeping a nice crunch.

Season the Base

In a large bowl, combine cucumbers, tomatoes, and onions. Sprinkle with salt, pepper, garlic powder, oregano, and basil. Toss gently to avoid crushing the tomatoes.

Make the Tangy Marinade

In a separate bowl, whisk together:

Vinegars

Lemon juice

Remaining salt

Sugar

Slowly add olive oil and neutral oil while whisking until well combined. Taste and adjust sweetness or acidity as needed.

Combine & Toss

Pour the marinade over the vegetables and gently toss until everything is evenly coated.

Marinate for Best Flavor

Let the salad sit at room temperature for 20–30 minutes, then refrigerate for at least 1 hour (up to 4 hours). This step enhances flavor and softens the vegetables slightly.

Serve & Enjoy

Stir gently before serving, garnish with fresh parsley, and serve chilled. Don’t forget to spoon extra marinade over the top it’s the best part!

Health Benefits of This Fresh Vegetable Salad

Cucumbers: Hydrating and low in calories, great for digestion
Tomatoes: Rich in antioxidants like lycopene for heart health
Onions: Support immune function and add natural sweetness
Olive oil: Provides healthy fats for heart and brain health

This healthy cucumber tomato salad recipe is perfect for anyone looking to eat clean without sacrificing flavor.

Tips for the Best Marinated Salad

Slice vegetables thinly for better flavor absorption
Chill before serving for maximum freshness
Adjust sugar and vinegar to your taste preference
Use fresh garden vegetables for the best flavor
Add feta cheese or olives for a Mediterranean twist

Serving Ideas

This easy summer salad recipe pairs perfectly with:

Grilled chicken or fish

Burgers and BBQ dishes

Light lunches with crusty bread

Storage Tips

Store leftovers in an airtight container in the refrigerator for up to 2 days. The flavors deepen over time, making it even more delicious the next day!