Tomato Cucumber Avocado Salad
This Tomato Cucumber Avocado Salad is from a reader named Lisa and the simple balsamic vinegar dressing makes these ingredients shine! This salad is so simple and good you’ll probably make it all summer long.
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There are lots of salads with tomatoes and cucumbers on this site, and to me that combination just screams summer. But I also eat tomatoes and cucumbers all year (whenever I can get good flavorful cherry tomatoes and Persian cucumbers from Costco.) So when a reader from Hawaii named Lisa sent me her recipe for this Tomato Cucumber Avocado Salad that she called “dumb salad” and said it was something she made often, I was interested.
Lisa discovered this combination when she was going out of town and needed to use what was on hand, and I promise you, this simple salad that just combines cucumbers, tomatoes, green onion, avocado, and balsamic vinegar is not dumb at all! This recipe that’s low-carb, Keto, gluten-free, and vegan, is probably going to become a recipe you’ll make over and over when you have avocado and just want an easy salad for a side dish.
Of course, make this Tomato Cucumber Avocado Salad only when you have fresh flavorful tomatoes, but I loved this combination, accented with just sea salt and coarse ground black pepper. And I like the idea of a salad with no added oil except the fat from the avocado.
Lisa invited me to change it up, but really I didn’t change it much except to sub sliced green onions for the sweet onions she used. And I was making more than I’d eat right away, so I also tossed the avocado with just the tiniest bit of lemon juice to make sure it didn’t go brown. And the first time I tried it, I made the salad like Lisa does and happily gobbled it up for lunch!
What ingredients do you need for this recipe?
(This is only a list of ingredients; please scroll down for complete printable recipe. Or if you use the JUMP TO RECIPE link at the top of the page, it will take you directly to the complete recipe.)
- small Persian cucumbers or fresh garden cucumbers
- fresh tomatoes or cherry tomatoes
- green onion
- fresh-squeezed lemon juice, I used my fresh-frozen lemon juice
- good-quality balsamic vinegar
- sea salt and fresh ground black pepper to taste
What Vinegar did I use for the Tomato Cucumber Avocado Salad?
This simple salad has so few ingredients that you want to be sure every ingredient tastes great, so be sure to use good quality balsamic vinegar! But you don’t need expensive Balsamic Vinegar that’s $40 a bottle for this recipe! I’ve made it many times with medium-priced Colavita Aged Balsamic Vinegar (affiliate link) and I think it tastes great. The Balsamic Vinegar does slightly color the other ingredients, so if you happen to have white balsamic vinegar (affiliate link) that would also be a great choice.
What variations could you make for this salad?
The simple ingredients are one thing I think makes this Tomato Cucumber Avocado Salad so great. But Lisa’s friends suggested adding lots of chopped herbs, and I’m thinking mint, basil, or parsley could have a great supporting role in this salad if you wanted a variation. You could also add other things like olives, artichoke hearts, or hearts of palm, and Feta Cheese or Gorgonzola would also be a nice addition to the flavors here.
How to make Tomato Cucumber Avocado Salad:
(This is only a summary of the steps for the recipe; please scroll down for complete printable recipe. Or if you use the JUMP TO RECIPE link at the top of the page, it will take you directly to the complete recipe.)
- I used those small Persian cucumbers but you could also use one large European cucumber instead of three small ones.
- I don’t have garden tomatoes yet, so I used sweet Cherubs tomatoes from Costco. This is something I buy over and over. (Cherubs has never paid me or sent tomatoes, I just like their product!)
- I cut the green onion in slices to make about 1/4 cup, use more or less to taste.
- You need one perfectly ripe avocado, diced into smallish pieces.
- I tossed the avocado with just a couple of teaspoons of lemon juice to keep the leftovers from turning brown, but I’m guessing most of the time you make this it will all be eaten right away, so feel free to skip this step.
- Gently toss together the cucumbers, tomatoes, onion, and avocado, then dress with just enough good quality balsamic vinegar to coat the veggies.
- Season to taste with good sea salt and fresh ground black pepper and enjoy!
More Salads with Tomatoes and Cucumbers:
- Tomato, Cucumber, and Radish Salad
- Middle Eastern Tomato Salad
- Tomato Cucumber Salad with Peperoncini
- Tomato Cucumber Salad with Mint and Feta
- Tomato Salad with Cucumber, Avocado, and Cilantro
Tomato Cucumber Avocado Salad
This simple and delicious salad I got from a reader named Lisa just has tomatoes, cucumbers, avocado, green onion, and balsamic vinegar, and this is definitely not a dumb idea for a tasty salad!
- 3 small Persian cucumbers (see notes)
- 1 cup diced tomato or cherry tomatoes
- 1/4 cup thinly diagonally sliced green onion
- 1 avocado
- 2 tsp. fresh lemon juice (optional, for tossing with avocado)
- 1 T good-quality balsamic vinegar
- sea salt and fresh ground black pepper to taste
- Cut cucumbers in half lengthwise, then slice into half-moon slices. (I never peel Persian cucumbers, but if you use other cucumbers you might want to peel some of the skin off in stripes before you slice them.)
- Dice tomatoes or cut cherry tomatoes in half to make one cup. (Only make this salad when you have flavorful fresh tomatoes.)
- Slice green onion to make 1/4 cup, or more if you like onion.
- Peel and cut up the avocado into small cubes. Toss with lemon juice if desired, optional.
- Combine the cucumber, tomato, onion, and avocado in a plastic or glass bowl and gently toss together.
- Add a small amount of balsamic vinegar, enough to barely coat the veggies, and toss again. (I used about a tablespoon of vinegar, which was plenty.)
- Season to taste with your favorite sea salt and plenty of fresh-ground black pepper.
- If you like it as much as I did, you probably won’t have leftovers no matter how much you make!
You can also use one large European cucumber or two middle-sized garden cucumbers.
This recipe created by a reader named Lisa who lives on Maui.
Amount Per Serving: Calories: 120Total Fat: 8gSaturated Fat: 1gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 0mgSodium: 159mgCarbohydrates: 13gFiber: 5gSugar: 5gProtein: 3g
Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.
Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
This Tomato Cucumber Avocado Salad is perfect for most any low-carb eating plan, including Keto, and it’s also great for Paleo diets. Everything in this salad is a perfect ingredient for the original South Beach Diet, although avocado is a limited food for South Beach. This recipe does have some carbs in the tomatoes and avocado, but there is also fiber so the net carbs are lower than you might think. If you want a lower-carb option, use more cucumber in proportion to the tomato and avocado.
Find More Recipes Like This One:
Use the Salad Index to find more recipes like this one. Use the Diet Type Index to find recipes suitable for a specific eating plan. You might also like to follow Kalyn’s Kitchen on Pinterest, on Facebook, on Instagram, on TikTok, or on YouTube to see all the good recipes I’m sharing there.
Historical Notes for this Recipe:
I first posted this recipe on Kalyn’s Kitchen in 2011 after a reader named Lisa sent me the recipe. It was updated with better photos in 2022 and slightly updated with more information in 2023.
57 Comments on “Tomato Cucumber Avocado Salad”
Love all of the ingredients! Great summer salad!
Hope everyone else enjoys this as much as I did. And Sally, I love the idea of avocado just becoming part of the dressing; might have to experiment with that.
This is going to be lunch today! I can't wait!
It is truly amazing how the simplest ingredients are life's greatest pleasures. This is my kinda healthy salad 🙂
I love the simplicity of this salad and the ease with which it can be made. I share your love of tomatoes and cucumbers and this salad would quickly disappear in my kitchen. Have a wonderful day. Blessings…Mary
No, not dumb. Looks wonderful. I love simple salad like this one. Looks like a perfect combo for sure!
I've been getting TONS of cukes from my CSA and don't know quite what to do with them! I'm thinking this salad is gonna be it!
Definitely a winner of a salad, Kalyn!
I once made (by accident, I should add) a salad dressing with mashed avocado, lime juice, and a touch of white balsamic vinegar – it turned out soooo good! The avocado kind of melted, and indeed, no need for extra fat
I am making your version for our dinner tomorrow!
I'm glad people are liking this, and it's fun to hear more variations too. I think there are so many combinations with cucumbers and tomatoes that are good. Lisa called this Dumb Salad in the e-mail she sent me, but it's not dumb at all!
I think this would be good with a lime vinaigrette, too. I don't follow SB, so I don't know if you use honey or not, but I make a dressing that is 3 parts oil, 2 parts vinegar or citrus juice and 1 part honey with salt and pepper to taste. I know the lime version is good with avocado, so I'll bet it would be good with this as well.
I wasn't a fan of avocado's until recently, but since becoming a vegan, they've added that 'creamy' texture a lot of foods are missing. I'm really looking forward to trying this. Thanks!
This is truly one of my favorite salads ever. I cannot wait until our garden tomatoes are ripe — hopefully in the next couple of weeks!
I wouldn't call it a dumb salad either. Sometimes the best dishes use just a handful of top quality ingredients. Your salad looks wonderful and I just want to dive right in!
Omg I make a salad like that all the time! Sometimes I add feta cheese and other times mozzarella cheese. I change up the veggies as well but it's basically the same thing. A couple times I mixed the balsamic with some Italian dressing and it's soooo good! One of my favorite salads.
Not dumb at all! I eat this basic salad, without the onions, several nights a week for dinner. If your balsamic is sweet enough, you definitely don't miss the oil.
PS We are heart-broken, the cucumbers worms have invaded and destroyed this year's crop. We'd only been eating them for about a week and now, no more. Boo hiss.
I love avocados, too, but I eat too much of it when I get a chance especially, when I mix it with milk and sugar so it's quite counterproductive in my trying to lose weight. This recipe however sounds deliciously healthy. Thanks for sharing, Kalyn and Lisa. Why is it called "dumb salad" though?
I wouldn't call it a dumb salad at all. It has some of my favorite ingredients and I just love balsamic vinegar dressing. It pops up the flavor of these vegetables.
The title immediately caught my attention. A lovely, refreshing and beautiful salad like this one has nothing dumb about it:)