Easy, quick marinated tomato salad in red onions can be prepped and eaten in 20 minutes with delicious, bold and satisfying flavors. A cousin to the balsamic vinegar reduction, these tomatoes are instead marinated in red wine vinegar for a tart powerful side salad. Fresh, homemade, yum!
You will love this cold marinated tomato salad, which as the perfect balance of veggies, herbs, and homemade dressing. So simple to make, this is sure to be a lunch go to recipe!

Marinated Tomatoes Ingredient List
- red onion
- medium tomatoes
- fresh basil
- olive oil
- red wine vinegar
- sea salt
- cracked peppercorn
RELATED TOMATO RECIPES: Corn and Tomato Salad Recipe, Caprese Salad Recipe, Cucumber Tomato Salad Recipe, Cherry Tomato Salad Recipe
Recipe Video
Tomato Salad with Red Wine Vinegar Dressing
- First prep the onions by cutting sliced thin (or chop if you prefer) and slice the tomatoes into wedges.
- In a separate bowl, add tomatoes and fresh basil.
- Set aside.
- In a small bowl, whisk together olive oil, vinegar, salt and pepper.
- Add onions to tomatoes and mix well.
- Pour oil mixture over tomatoes and mix well.
- Let stand for a minimum of 20 minutes at room temperature.
- Stir before eating to prevent settling.
- Please see note about refrigerating olive oil dressings.

How to make Onions Less Strong
Red onions can often be over powering for some people. If you love red onions but would like them better toned, a simple trick is to cut your onion and then put in water for 10-15 minutes. This helps soften the onion and pull out some of the flavors.
Note about Cold Olive Oil
Olive oil can change consistency in the fridge if you keep your refrigerator super cold – it is, after all, a fat. How fast it happens really boils down to the actual olive oil and what ingredients are in it. Typically this does not affect the taste, however, it can look or seem weird. Simply bring your salad back up to room temperature for 30 minutes to liquefy the olive oil again or only add right before serving.
Is Marinated Tomato Salad Low Carb or Keto Friendly?
Typically tomatoes are not widely used in Keto, but in small increments, can be eaten in most low carb diets. It really depends how strict you choose to be with your dieting. Here is nutritional information for this tomato salad- broken down into 6 servings. This site uses Carb Manager that automatically inputs the ingredients into the system and gives out an estimated nutritional value.
Please always be careful to double check with your own apps. Carb Manager gave this recipe an “A”.

Tomato Salad Variations
Marinated salads are so good with just red onions and tomatoes, but you can add a few different things to boost up your salads if you like.
- Use any kind of tomato for this salad, including cut cherry and tomato salads. I prefer a slicing tomato or a ROMA tomato.
- Add quartered or sliced cucumbers.
- Like Cheese? Tomato salad goes great with cheeses like crumbled blue cheese, feta cheese, or small balls of mozzarella.
- Try adding a 1/2 cup of Fresh or Grilled Corn Kernels.
- Top with diced Avocado.
- Crumbled Bacon is delicious sprinkled on top of the tomatoes prior to serving.
- Change up the red wine vinegar for other vinegar flavors. Try the original suggestion first, but feel free to substitute the recipe for white wine vinegar or balsamic vinegar in a pinch (This will change the salad flavor too).
RELATED SIDE SALAD RECIPES: Cucumber Salad Recipe, Broccoli Salad, Broccoli Slaw Salad, Shrimp Pesto Salad Recipe, Dill Potato Salad Recipe

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If you enjoyed this recipe or made tweaks that worked well, please leave me a comment and let me know. I always enjoying trying your changes as well!