Easy Marinated Cucumber, Onion, and Tomato Salad

Introduction

When it comes to easy, refreshing side dishes, nothing beats a classic cucumber, onion, and tomato salad. This timeless recipe is crisp, tangy, and bursting with fresh garden flavors, making it the perfect companion to grilled meats, seafood, or even simple rice and bread dishes. With just a few ingredients and a quick marination process, you’ll have a salad that elevates any meal while staying incredibly budget-friendly and healthy.

My recipe story

This marinated cucumber, onion, and tomato salad has been a staple in my family for generations. I remember my grandmother preparing a big bowl of it every summer, especially when cucumbers and tomatoes were plentiful in her garden. She would always say that the secret was in letting the vegetables sit in the vinegar long enough to soak up all that tangy goodness. For me, this recipe is more than just a salad—it’s a reminder of family gatherings, backyard barbecues, and simple, wholesome meals made with love.

Ingredient breakdown

The beauty of this salad lies in its simplicity. Each ingredient contributes its own unique texture and flavor, blending together to create a refreshing balance. Cucumbers bring a cool, crisp crunch that forms the base of the dish. They absorb the tangy vinegar beautifully, making each bite juicy and refreshing.

The onions add just the right amount of sharpness and bite. When marinated, they soften and mellow, losing their harsh raw edge while enhancing the overall flavor. Tomatoes contribute sweetness and juiciness, making the salad colorful and flavorful. The vinegar acts as both a marinade and dressing, infusing everything with a bright, tangy flavor that ties the salad together.

Equipment you’ll need

• Cutting board and sharp knife
• Large mixing bowl
• Measuring cups
• Wooden spoon or spatula
• Plastic wrap or airtight container (for marinating)

Step-by-step directions

Step 1: Prepare the vegetables
Begin by peeling and slicing three medium cucumbers into thin, even rounds. Slice one medium onion into rings and cut three medium tomatoes into wedges. Try to keep the slices uniform for even marination and presentation. Fresh, firm vegetables work best here, so choose cucumbers without soft spots and tomatoes that are ripe but not mushy.

Step 2: Make the marinade
In a separate small bowl, combine ½ cup of vinegar with a pinch of salt and a sprinkle of black pepper. You can also add a teaspoon of sugar if you prefer a slightly balanced tang. Whisk everything together until the salt and sugar dissolve, creating a simple but flavorful marinade that will penetrate the vegetables.

Step 3: Combine ingredients
Place the sliced cucumbers, onion rings, and tomato wedges into a large mixing bowl. Pour the vinegar mixture evenly over the vegetables. Using a wooden spoon or spatula, gently toss everything together to ensure that all the slices are coated with the marinade. Be careful not to crush the tomatoes as they are more delicate than cucumbers and onions.

Step 4: Marinate
Cover the bowl with plastic wrap or transfer the mixture into an airtight container. Place it in the refrigerator for at least 2–3 hours, though overnight is ideal. This resting time allows the vegetables to soak in the tangy marinade, soften slightly, and develop deeper flavors. The longer it sits, the more vibrant the taste will be.

Step 5: Serve
Before serving, give the salad one final gentle toss to redistribute the marinade. Taste and adjust seasoning with a little extra salt or pepper if needed. Serve chilled as a refreshing side dish alongside your favorite grilled meats, roasted chicken, or seafood. It’s also a wonderful addition to potluck tables or family gatherings.

Variations & substitutions

This recipe is very adaptable. You can substitute apple cider vinegar or red wine vinegar for a slightly different flavor profile. If you prefer a sweeter balance, add a tablespoon of honey or sugar to the marinade. Fresh herbs like dill, parsley, or basil can elevate the freshness and add aromatic notes. For a spicier kick, toss in a few slices of fresh chili or sprinkle some red pepper flakes. If onions are too strong for your taste, use sweet onions or shallots for a milder flavor.

Storage, freezing & make-ahead

This salad stores well in the refrigerator for up to 3 days in an airtight container. The flavors intensify the longer it sits, though the cucumbers may soften slightly. It’s not suitable for freezing, as the vegetables lose their crispness once thawed. If you want to make it ahead for a party, prepare it the night before and keep it chilled until ready to serve. Just give it a gentle stir before serving to refresh the flavors.

Serving ideas & pairings

This marinated cucumber, onion, and tomato salad pairs beautifully with grilled chicken, steak, or fish. It also complements barbecue dishes like ribs or pulled pork, cutting through the richness with its tangy freshness. For vegetarian meals, serve it alongside roasted vegetables, grain bowls, or falafel wraps. It can even be enjoyed on its own as a light lunch with a slice of crusty bread on the side.

FAQ

Can I use cherry tomatoes instead of regular tomatoes?
Yes! Cherry or grape tomatoes work well and add extra sweetness and color to the salad.

What type of vinegar works best?
White vinegar is classic, but apple cider vinegar and red wine vinegar add a lovely twist in flavor.

Can I add olive oil to the marinade?
Absolutely. A tablespoon or two of olive oil can balance the acidity and add a smooth richness.

How long should I marinate the salad?
At least 2–3 hours for good flavor, but overnight for the best results.

Is this salad healthy?
Yes, it’s naturally low in calories, full of fiber, and packed with vitamins from fresh vegetables.

Final thoughts

Marinated cucumber, onion, and tomato salad is proof that simple ingredients can create extraordinary flavors. Crisp cucumbers, tangy onions, and juicy tomatoes come alive when marinated in vinegar, making a refreshing side dish that complements nearly any meal. Whether you’re preparing it for a summer barbecue, a weekday dinner, or a family gathering, this recipe is quick, versatile, and always a crowd-pleaser. Once you try it, you’ll want to keep it in your rotation all year long.

Marinated Cucumber, Onion, and Tomato Salad

---

• Author: Sarah White
• Total Time: 3 hours 15 minutes (including marinating)
• Yield: 4 servings
• Diet: Gluten Free

Print Recipe

Pin Recipe

Description

A refreshing, tangy salad made with crisp cucumbers, juicy tomatoes, and zesty onions marinated in vinegar. Perfect as a light side dish.

---

Ingredients

• 3 medium cucumbers, peeled and sliced

• 1 medium onion, sliced into rings

• 3 medium tomatoes, cut into wedges
• ½ cup vinegar

• ½ teaspoon salt

• ¼ teaspoon black pepper
• 1 teaspoon sugar (optional)

---

Instructions

1. Peel and slice the cucumbers, cut the tomatoes into wedges, and slice the onion into thin rings.

2. In a small bowl, whisk together the vinegar, salt, pepper, and sugar until dissolved.
3. Place the cucumbers, tomatoes, and onions in a large bowl and pour the vinegar mixture over them.

4. Toss gently to coat, cover, and refrigerate for at least 2–3 hours to marinate.

5. Before serving, stir gently and adjust seasoning if needed. Serve chilled.

Notes

For best flavor, allow the salad to marinate overnight. Store in an airtight container in the refrigerator for up to 3 days. Pairs beautifully with grilled meats, seafood, or simple rice dishes.

• Prep Time: 15 minutes
• Cook Time: 0 minutes
• Category: Salad
• Method: No-Cook
• Cuisine: American