Name: Raw Tomato, Cucumber & Onion Marinated Summer Salad
Prep time: 15 min
Cook time: 120 min
Total time: 135 min
Ingredients: Here's exactly what goes into this salad:; For the Marinade; 1 cup water; ½ cup distilled white vinegar; ¼ cup vegetable oil; ¼ cup white sugar; 1 teaspoon salt (or to taste); 1 teaspoon freshly ground black pepper (or to taste); For the Vegetables; 3 cucumbers (peeled and sliced ¼-inch thick); 3 tomatoes (cut into wedges); 1 onion (sliced and separated into rings); Quick FYI on the sugar- some refined white sugar is processed using bone char

No stove, no oven, no sweating over a hot pan in July. This Raw Tomato, Cucumber & Onion Marinated Summer Salad is the kind of recipe that saves you when it’s too hot to cook but you still want something genuinely satisfying. I make a batch of this practically every week once summer produce hits its stride, and it somehow gets better every time I make it.

This salad is 100% vegan, comes together with pantry staples, and does all its “cooking” in the fridge. No heat required, no complicated technique, just fresh vegetables soaking up a tangy marinade. Ready to make the easiest, most refreshing side dish of your summer? Let’s get into it.

Quick Recipe Snapshot

Here’s what you’re signing up for:

Prep time- 15 minutes
Marinating time- 2 hours
Total time- 2 hours 15 minutes
Servings- 6
Calories- roughly 156 kcal per serving

Yes, most of that time is just hands-off fridge time, so don’t panic about the 2-hour total. Your actual hands-on effort here is 15 minutes, tops.

Equipment You’ll Need

Keep it simple, nothing complicated required:

Large mixing bowl– for whisking the marinade and combining everything
Whisk – for blending the marinade until smooth
Vegetable peeler – for peeling the cucumbers
Plastic wrap or a lid – for covering the bowl while it chills

That’s the entire list. No blender, no food processor, no fancy marinating container. Ever notice how the best summer recipes ask almost nothing of you? This one fits that mold perfectly.

Why This Marinated Salad Actually Works

Here’s the thing about raw vegetable salads: they can taste flat if you just toss everything together and call it done. This recipe avoids that problem entirely by letting the vegetables sit in an actual marinade, not just a light dressing. The vinegar, sugar, and oil combination pulls moisture out of the vegetables while pushing flavor in.

I used to think marinated salads were just a fancier way of saying “salad with dressing.” Turns out that’s not quite right. The 2-hour rest in the fridge is what transforms crisp raw vegetables into something genuinely tangy and flavorful all the way through, not just on the surface. Skip the marinating time and you’ll just have vegetables in vinegar water not the same thing at all.

And because everything here is raw and plant-based, this salad checks every box for fresh plant-based summer comfort food cooling, hydrating, and satisfying without ever touching a stove.

The Ingredients Breakdown

Here’s exactly what goes into this salad:

For the Marinade

1 cup water
½ cup distilled white vinegar
¼ cup vegetable oil
¼ cup white sugar
1 teaspoon salt, or to taste
1 teaspoon freshly ground black pepper, or to taste

For the Vegetables

3 cucumbers, peeled and sliced ¼-inch thick
3 tomatoes, cut into wedges
1 onion, sliced and separated into rings

Quick FYI on the sugar- some refined white sugar is processed using bone char, so if strict veganism matters to you, grab an organic or certified vegan sugar brand instead. Small detail, but worth knowing.

A Note on Choosing Your Vegetables

This recipe genuinely lives or dies by the quality of your produce, no exceptions. Ever bitten into a mealy cucumber or a mushy tomato and wondered why the whole dish tasted off? That’s exactly the risk here if you skip the farmers market and grab whatever’s on sale.

Look for firm cucumbers without soft spots, tomatoes that are ripe but not overly soft, and an onion with tight, dry layers. Since nothing here gets cooked, every ingredient’s natural flavor and texture stays front and center. There’s nowhere for a mediocre vegetable to hide.

Step-by-Step Instructions

Time to actually put this together.

Step 1- Gather your ingredients. Get everything measured and ready before you start this recipe moves fast once you begin.

Step 2- Whisk the marinade. Whisk the water, vinegar, oil, sugar, salt, and black pepper together in a large bowl until the mixture looks smooth and slightly cloudy from the sugar dissolving.

Step 3- Add the vegetables. Add the sliced cucumbers, tomato wedges, and onion rings to the bowl. Stir everything gently to make sure each piece gets coated in the marinade.

Step 4- Chill and marinate. Cover the bowl with plastic wrap and refrigerate for at least 2 hours for the best flavor results. If you can stand the wait, letting it sit overnight makes the flavors even more pronounced.

Tips for Getting This Right Every Time

A few things I’ve picked up from making this more times than I can count:

Slice everything evenly. Uneven cucumber slices or onion rings marinate at different rates, which throws off the texture.
Don’t skip the full marinating time. I know waiting is annoying when you’re hungry now, but the flavor difference between 30 minutes and 2 hours is significant.
Stir once partway through. Giving everything a gentle stir halfway through the marinating time helps distribute the flavor more evenly.
Taste before serving. Marinade strength varies depending on your vegetables’ water content, so adjust salt and pepper right before serving if needed.

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Storage & Make-Ahead Tips

This salad genuinely gets better with time, which makes it a great make-ahead option. Store it covered in the fridge for up to 4 days, and expect the flavor to deepen the longer it sits.

Keep in mind the vegetables will soften slightly the longer they marinate, so if you love a crisp bite, eat it within the first day or two. If you prefer a more pickled, tender texture, let it ride out the full storage window.

Frequently Asked Questions

Can I use apple cider vinegar instead of distilled white vinegar? You can, though it’ll shift the flavor slightly sweeter and more mellow than the sharper tang of white vinegar. Either works, it’s really a matter of preference.

Is this salad gluten-free? Yes, as written every ingredient here is naturally gluten-free with no modifications needed.

Can I add other vegetables to this? Absolutely. Bell peppers, radishes, or even shredded carrots work well marinated the same way. Just add them along with the cucumbers, tomatoes, and onion.

Why is my salad watery after marinating? That’s completely normal. Cucumbers and tomatoes release a lot of their natural water content once salted and marinated. Just drain off a bit of excess liquid before serving if it bothers you.

Nutrition Information

Here’s the rough breakdown per serving:

Calories- 156 kcal
Total carbohydrates- 18g
Dietary fiber- 3g
Total sugars- 12g
Protein- 2g
Total fat- 10g
Saturated fat- 2g
Vitamin C- 15mg
Sodium- 784mg
Calcium- 37mg
Iron- 1mg
Potassium- 394mg

Keep in mind sodium runs a bit higher here, so adjust the added salt if you’re watching your intake closely.

My Final Thoughts

This Raw Tomato, Cucumber & Onion Marinated Summer Salad proves that the best summer dishes sometimes need zero cooking at all. A simple tangy marinade and a couple hours of patience turn basic garden vegetables into something you’ll want to make on repeat.

So next time it’s too hot to even think about turning on the stove, skip the takeout menu. Whisk together this marinade, toss in whatever crisp vegetables you’ve got, and let your fridge do all the work. If you make this, drop a comment below and let me know what other vegetables you added it genuinely helps this little corner of the internet keep running.