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Cucumber, Tomato, and Onion Salad tastes like summertime in a bowl. Cool, crisp cucumber, fresh, sweet tomatoes, the spicy bite of onion, and a tangy vinaigrette all combined to make a quick, easy, and healthy summer salad.
If you’re looking for a super quick, super easy salad for summer BBQs, potlucks or just a quick side for a weeknight dinner, then look no further. This Cucumber, Tomato, and Onion Salad totally has you covered!
I recently made this salad as an accompaniment to our 4th of July dinner. On the 7th of July, my husband officiated his sister’s wedding. His baby sister had asked him if he would get ordained and officiate her wedding a few years ago. Of course, he said yes! 🙂 Since then, he also performed a wedding for some friends of his. Of course, this meant a rehearsal dinner, family gatherings and the wedding itself. Due to all my dietary restrictions, potlucks, eating out, and family BBQ’s are all very difficult. I have found it’s just easier if I bring my own food most of the time. For the rehearsal dinner, I brought a dish of romaine lettuce, sharp shredded cheddar cheese, leftover brisket and the leftover Cucumber, Tomato and Onion Salad. I, quite literally, dumped it all together, put the lid back on the salad dish, gave it a vigorous shake and Voila a dinner salad complete with vinaigrette dressing. Yum!
Cucumber, Tomato, and Onion Salad – Low FODMAP option
Shortly after making this salad, I found out that I needed to switch to a low FODMAP diet due to SIBO (Small Intestine Bacterial Overgrowth). Cucumbers and tomatoes are allowed on the diet, so I decided to switch up this recipe a bit to make it low FODMAP. It turned out really well. In fact, I think I like it as much, if not a little bit better, than the original recipe. Winner! 🙂 If you are curious about SIBO then click here or interested in the low FODMAP diet, click here.
Really the swaps were super easy. Unfortunately, onion and garlic are no-no’s on the low FODMAP diet. Sad 🙁 So, instead of using onion, I used thinly sliced radish and green onion (only the top green parts!). Otherwise, the recipe is essentially the same.
Fresh, crisp, tangy, healthy, quick and easy to prepare, this Cucumber, Tomato, and Onion Salad hits every mark!

Cucumber, Tomato, and Onion Salad (soy free, gluten free, low fodmap option)
Ingredients
- 1 whole English Cucumber cut in half lengthwise and sliced thin into half moons
- 2 cup Grape Tomatoes cut in half or thirds depending on size
- 1/3 medium Onion (red or yellow sweet) cut into quarters then thinly sliced
- 2 Tbsp White Wine Vinegar
- 1/4 cup olive oil
- 1/2 tsp Dill dried or fresh-adjust qty if using fresh
- 1/4-1/2 tsp salt (Himilayan Sea Salt or Coarse Salt to taste
Instructions
- In a small bowl combine the vinegar, dill and salt. Very slowly stream in the olive oil, whisking vigorously to combine.
- Combine the cucumber, tomatoes and onion (or radish and green onion for low FODMAP version) in a bowl.
- Slowly add in the dressing and toss to coat. Note: go slow, you may not need all the dressing. Taste test as you go.
Notes
- For low FODMAP version, omit the onion and add in 8-10 thinly sliced radishes and the tops of a couple green onions. I cut the radishes into quarters first, then thinly slice so you end up with kind of pie shaped wedges. Also, thinly slice just the green tops of a couple green onions and add with the other vegies.
- Double the dressing ingredients and reserve the rest to have a ready made vinaigrette for salads. I like to store in the fridge in a mason jar with a plastic lid.
- Feel free to substitute your favorite herbs in this salad. I only had dried dill on hand but fresh would be way better.
- This salad can keep in the fridge for a few days but keep in mind that the vegies will wilt a bit. If making ahead for a potluck or BBQ, I would prep all the vegies and dressing but store separately then combine together about 2-6 hours before you plan to eat for best flavor and "crispness".
- Feel free to switch out the vinegar for Red Wine Vinegar, Apple Cider Vinegar etc. Just keep in mind that they would change the flavor a bit. I tend to prefer White Wine Vinegar with cucumbers but totally your choice.
- Another really good option would be to use one Lemon Cucumber and only half an English Cucumber. I actually think I like this option even better. 🙂
I hope you enjoy this salad. Please let me know what you think in the comments below. If you make this recipe, please post a pic on instagram #naturallyliz.
~Naturally yours~
Liz The form you have selected does not exist.
Soy makes me crazy stick too, so thank you for your lists and recipes. It’s cool to know you know about the AIP diet as well. I’ll put these recipes in my recipes memo on Google Keep. Have a good one Liz!