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Easy Low-Carb Tomato Summer Salad

4.7 stars, average of 113 ratings

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Fresh and zingy tomato salad and summertime backyard fun — this salad brings so many childhood memories and it always takes me back to Czechia where I grew up.

With the abundance of home-grown veggies in summer, my mum used to make this salad almost every other day. This is a really great salad for any summer barbecue and with so many low-carb BBQ recipes you will never be short on ideas!

We like to serve it as a side dish with meat or fish but you can easily transform this salad into a complete meal by adding slices of grilled chicken or crumbled feta cheese. The traditional Czech tomato salad doesn't actually include olive oil but I added a drizzle just to keep it keto with healthy fats. If you need to increase the fat content even further, just add a few slices of avocado, use fatty protein like salmon, sardines, mackerel, pork or even roast chicken (skin on!).

The best part? This low-carb side salad is ridiculously simple! You'll only need tomatoes, onion, garlic, parsley and a simple sugar-free vinaigrette. Beef tomatoes are a great choice because they contain fewer seeds and juices so your salad won't be swimming in them. I like yellow onions because they add a sharp and spicy kick but feel free to sub them with mild and sweet white or red onions.

You can make this low-carb side salad one or two days in advance but it is best eaten fresh. The flavour and the texture will both change as you refrigerate it and the tomatoes will soften and release juices. So freshly prepared is your best bet — and it only takes a few minutes!

I hope you enjoy!

Hands-on Overall

Allergy information for Easy Low-Carb Tomato Summer Salad

✔  Gluten free
✔  Dairy free
✔  Egg free
✔  Nut free
✔  Pork free
✔  Avocado free
✔  Coconut free
✔  Fish free
✔  Shellfish free
✔  Beef free

Nutritional values (per serving)

Net carbs5.9 grams
Protein1.6 grams
Fat7.3 grams
Calories108 kcal
Calories from carbs 25%, protein 7%, fat 68%
Total carbs8.3 gramsFiber2.4 gramsSugars5.4 gramsSaturated fat1.1 gramsSodium303 mg(13% RDA)Magnesium24 mg(6% RDA)Potassium477 mg(24% EMR)

Ingredients (makes 4 side servings)

  • 2 - 3 large beef tomatoes or any tomatoes (680 g/ 1.5 lb)
  • 1 medium yellow onion, sliced (110 g/ 3.9 oz)
  • 1 bunch of parsley, chopped (15 g/ 0.5 oz)
  • 1 clove garlic, minced
  • 2 tbsp apple cider vinegar or white wine vinegar (30 ml)
  • 2 tbsp extra virgin olive oil (30 ml)
  • 1 tbsp powdered Erythritol or Swerve (10 g/ 0.4 oz)
  • 1/2 tsp rough sea salt, or to taste
  • 1/4 tsp black pepper, or to taste


  1. Finely chop the parsley. Peel the onion and garlic. Easy Low-Carb Tomato Summer Salad
  2. Cut the tomatoes into wedges and place in a large salad bowl. Slice the onion and add to the bowl. Add minced garlic. Easy Low-Carb Tomato Summer Salad
  3. To make the vinaigrette, simply mix the vinegar, olive oil, sweetener, salt and pepper. Make sure the sweetener is completely dissolved. Easy Low-Carb Tomato Summer Salad
  4. Pour over the ingredients in the salad bowl and mix and toss to combine. Easy Low-Carb Tomato Summer Salad
  5. Let it sit for a few minutes before serving to allow the flavours to combine. Eat immediately or store in an airtight container in the fridge for up to 3 days. Easy Low-Carb Tomato Summer Salad

Ingredient nutritional breakdown (per serving)

Net carbsProteinFatCalories
Tomatoes, beef (large), fresh
3.6 g1.2 g0.5 g34 kcal
Onion, brown (yellow), raw
1.8 g0.2 g0 g10 kcal
Parsley, fresh (spices)
0.1 g0.1 g0 g1 kcal
Garlic, fresh
0.2 g0 g0 g1 kcal
Apple cider vinegar
0.1 g0 g0 g2 kcal
Olive oil, extra virgin
0 g0 g6.8 g60 kcal
Erythritol (natural low-carb sweetener)
0.1 g0 g0 g1 kcal
Salt, sea salt
0 g0 g0 g0 kcal
Pepper, black, spices
0.1 g0 g0 g0 kcal
Total per serving
5.9 g1.6 g7.3 g108 kcal

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Martina Slajerova
Creator of

Martina Slajerova

I changed the way I ate in 2011, when I was diagnosed with Hashimoto’s, an autoimmune disease that affects the thyroid. I had no energy, and I found it more and more difficult to maintain a healthy weight.

That’s when I decided to quit sugar, grains, and processed foods, and to start following a whole-foods-based ketogenic approach to food.

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Comments (6)

Can I use stevia instead of swerve?

Yes you can! I'd probably go with only 2 drops, no more than 5. Stevia is very sweet so it's better to start with less and add more if needed. If you're using powdered, here are some conversions that may help: Top 6 Keto Sweeteners and Low-Carb Sweetener Conversion Chart

I agree with Emily! I love the healthy, wholefoods approach rather than trying to "keto-fy" junk food...keep up the healthy approach Martina you are killing it!!

Thank you so much Margaret, you are very kind!

Martina I am so impressed with your recipes! I don't know of any other website paying so much attention to... everything! All those photos on how to make it that I barely have to read the steps, the nutrition breakdown, the list of macros... I am so astounded! When I thought it can't possible get any better I get your app only to realize that I can add all your meals to my Planner!! WOW WOW WOW! Keep up the good work

Thank you so much Emily, your comment made my day!!