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    Home » Recipes » Salads

    Tomato Onion Salad

    Published: Jun 20, 2022 by Kate Hackworthy · This post may contain affiliate links ·

    Jump to Recipe
    Salad on a plate on a wooden table, with text: Tomato Onion Salad.
    A salad of sliced tomatoes and onions on a plate, with text: how to make tomato and onion salad.

    This classic Tomato Onion Salad is a warm-weather favorite that uses fresh tomatoes, sliced red onions, and delicious white wine vinegar dressing to create a refreshing side dish that makes a great addition to any main course!

    Wooden table with dish of tomato and onion salad.
    Tomato Onion Salad

    Summertime is the perfect time to enjoy fresh salads made with seasonal produce. You'll love this simple, classic Tomato and Onion Salad - so easy, refreshing, and tasty!

    Tomatoes are probably one of the most abundant vegetables in the warmer months. They're in season from late spring through early fall, so there's no shortage of them during the summer!

    There are also so many different varieties including cherry tomatoes, heirloom tomatoes, and even tomato hybrids that have varying flavor profiles.

    This salad is a great way to use up some of those fresh tomatoes in a very delicious way! Sliced tomato is paired with the bold flavor of red onion and seasoned with a simple white wine vinegar dressing that enhances all the flavors.

    This salad is light, refreshing, and perfect for any BBQ, potluck, or to make as a healthy side dish for any main course.

    You'll also love these other great salad recipes: Feta & Pesto Couscous Salad, Leek Salad with Honey Mustard Dressing, Roasted Red Kuri Squash Salad, Pear and Gorgonzola Salad with Maple Dijon Dressing.

    Jump to:
    • Why You'll Love This Recipe
    • Ingredients
    • Instructions
    • Top tips
    • Variations
    • Storage
    • FAQs
    • Salad Recipes
    • 📖 Recipe
    • 💬 Comments

    Why You'll Love This Recipe

    A simple tomato onion salad is a great way to use up the abundance of summer tomatoes.

    You can use any tomatoes you enjoy for this recipe including heirloom or hybrid tomatoes.

    The dressing is easy to make and enhances the natural flavor of the tomatoes.

    A simple French style recipe.

    No cooking involved! This salad can be whipped up in just minutes with no need to turn on the oven, grill, or stovetop!

    Close up of a salad with sliced tomatoes and onion.

    Ingredients

    • Ripe Tomatoes - These naturally sweet and savory fruits make a perfect base for this summer salad. Use any variety of tomatoes you enjoy, such as heirloom tomatoes, just make sure they are ripe!
    • Red Onion - Adds a mild onion flavor to the salad that pairs well with the dressing and tomato.
    • Garnish - A mix of fresh basil and freshly ground black pepper top the salad off giving it color and flavor.

    For the dressing

    • Extra Virgin Olive Oil - The oil base of the dressing, olive oil adds a rich flavor and helps hold the rest of the ingredients.
    • White Wine Vinegar - The acid-base of the dressing, white wine vinegar gives the dressing its classic acidic tang and tart flavor.
    • Minced Garlic Clove - Complements the flavor of the red onion and tomato.
    • Sugar & Salt - Enhances the flavors in both the dressing and the vegetables used.

    Please see the recipe card below for quantities.

    Instructions

    Wondering how to make this Tomato Onion Salad recipe? It's easy! Just follow this step-by-step photo tutorial. Then, scroll down for the recipe card for the full ingredients list and recipe method.

    Slicing tomatoes and onions.

    Prepare the vegetables: Wash the tomato with cold water to remove any dirt and impurities. Using a sharp knife (or mandoline cutter), cut off the stem, then slice into ¼ inch thick slices. Peel and slice the onion into ¼ inch thick slices.

    Layering the sliced onion and tomatoes.

    Assemble the vegetables: Layer the sliced tomatoes on a plate overlapping slightly followed by the sliced red onion.

    Whisking dressing.

    Make the dressing: Add all of the dressing ingredients to a small bowl and whisk until combined.

    Finishing the salad with basil.

    Assemble the salad: Drizzle the mixed dressing over the top of the sliced vegetables. Top with basil and black pepper. Serve and enjoy!

    Top tips

    When choosing the perfect tomato for this salad, you want to make sure that it is ripe but not overripe. The best way to tell if a tomato is ripe is to gently squeeze it. The skin should give slightly but the tomato shouldn't be too soft.

    Slice the vegetables all roughly the same size to make sure the texture of the salad is even and consistent.

    The dressing can be made ahead of time and stored for at least 30 minutes in the fridge to further develop the flavors.

    Don't overlap the vegetables too much as this makes it difficult to serve the salad properly.

    This salad is best served cold or just at room temperature. Do not leave chilled food out at room temperature for longer than 45 minutes.

    Variations

    If you don't have white wine vinegar, you can substitute it with another type of vinegar like apple cider vinegar or red wine vinegar.

    Kick up the heat by adding a pinch of red pepper flakes to the dressing!

    Instead of basil, try other fresh leafy herbs as a garnish including oregano, thyme, or chives.

    Change the presentation and shape of the salad by using your favorite cherry tomatoes halved or quartered.

    Add some fresh mozzarella cheese, feta or ricotta, to the top for an additional creamy and salty layer of flavor.

    Sprinkle with some seasonings such as Baharat Spice Blend, Shawarma Seasoning, Homemade Old Bay Seasoning or Everything Bagel Seasoning.

    Storage

    This salad is best served immediately. If you have leftovers, they can be stored in an airtight container in the fridge for up to 24 hours. However, the tomato will release water as it sits and may make the salad soggy. Freezing is not recommended.

    If you want to make this salad ahead of time, I suggest storing the tomato and onion separately from each other and from the dressing. This way, they won't have a chance to release water and make the salad soggy. Simply assemble everything together when you're ready to serve.

    FAQs

    What is the best tomato to use for tomato salad?

    The best tomato to use for tomato salad is a ripe but not overripe tomato. Varieties include beefsteak, heirloom, or cherry tomatoes.

    How do you keep tomato salad from getting watery?

    The best way to keep tomato salad from getting watery is to use ripe but not overripe tomatoes that can quickly start to release their moisture. Also, make sure the salad is not out at room temperature for more than 45 minutes.

    Can I use a more mild onion for this recipe?

    Yes, if you need a less strong onion flavor, use thinly sliced shallots or chopped green onion instead of red onion.

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    Salad Recipes

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    📖 Recipe

    Tomato onion salad on a plate.

    Tomato Onion Salad

    Kate Hackworthy | Veggie Desserts
    This Tomato Onion Salad is a warm-weather favorite with fresh tomatoes, sliced red onions, and simple white wine vinegar dressing!
    5 from 6 votes
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    Prep Time 10 mins
    Total Time 10 mins
    Course Appetizer, Salad, Side Dish
    Cuisine French
    Servings 6
    Calories 77 kcal

    Equipment

    • Knife
    • Cutting board

    Ingredients
     

    • 2 pounds tomatoes ripe (about 4, 900g)
    • 1 red onion

    For the dressing

    • 2 tablespoons extra virgin olive oil
    • 1 tablespoon white wine vinegar
    • ½ garlic clove minced
    • ¼ teaspoon sea salt
    • ¼ teaspoon sugar

    Garnish

    • 1 tablespoon basil finely sliced
    • ⅛ teaspoon black pepper freshly ground

    Instructions
     

    • Slice the tomatoes into rings, about ¼-inch thick.
    • Peel the onion and slice it into ¼-inch thick rounds.
    • Lay the tomatoes and onions on a plate, overlapping slightly.
    • Stir the dressing ingredients together, then drizzle over the tomatoes and onions.
    • Sprinkle the top with the pepper and basil.

    Nutrition

    Calories: 77kcalCarbohydrates: 8gProtein: 2gFat: 5gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gSodium: 106mgPotassium: 389mgFiber: 2gSugar: 5gVitamin A: 1278IUVitamin C: 22mgCalcium: 21mgIron: 1mg

    The nutritional information provided is approximate and can vary depending on several factors, so is not guaranteed to be accurate. Please see a registered dietician for special diet advice.

    Tried this recipe?Mention @kateveggiedesserts or tag #veggiedesserts! I love seeing your recreations.

    More Salad Recipes

    • Kohlrabi Slaw
    • Kohlrabi Salad
    • Butternut Squash Salad
    • Feta & Pesto CousCous Salad
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    Reader Interactions

    Comments

    1. Emese

      June 23, 2022 at 10:34 am

      5 stars
      I love this salad. Saw it on pinterest and had everything in the fridge. So simple but so good.

      Reply
    2. Mahy

      June 21, 2022 at 12:43 pm

      5 stars
      Tomato and onions... wow. Does the flavor combo get any better than this? So yummy AND healthy!

      Reply
    3. Rosemary

      June 21, 2022 at 10:48 am

      5 stars
      A personal favorite and a must for the summer. I usually add basil for an extra touch and it's delicious. Love this simple and delicious recipe!!

      Reply
    4. kushigalu

      June 21, 2022 at 10:37 am

      5 stars
      Refreshing, healthy, and one of my favorite salad recipes. Thanks for sharing.

      Reply
    5. Claire Carter

      June 21, 2022 at 10:30 am

      5 stars
      Such a simple and delicious easy salad!

      Reply

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    Hi, I'm Kate, a journalist, author and multi-award-winning food blogger. I hope you enjoy my vegetarian and vegan recipes. About Me

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    Popular recipes

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    • Easy Naan Bread Recipe (yeast-free)
    • Mini Baked Potatoes
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    • Easy Healthy Cabbage Soup
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    Check out my Veggie Desserts Cookbook, full of tasty desserts with vegetables!

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