I made this Tomato Onion Salad Recipe last weekend when my garden tomatoes were finally ripe, and I could not stop eating it straight from the bowl. It only takes a handful of ingredients, but the flavor is bold, tangy, and completely refreshing. I love that I can throw it together in ten minutes flat, whether I am prepping for a backyard cookout or just want a quick lunch.
Once you try the simple dressing on juicy tomatoes and sweet onion, you will understand why this salad shows up at every potluck I attend. It is proof that the best recipes do not need to be complicated to taste amazing.
Ingredients You’ll Need
- Ripe tomatoes (4 medium, cut into wedges) – choose tomatoes that give slightly when pressed, since firm or underripe ones will taste bland and mealy
- Sweet onion (1 medium, thinly sliced) – a mild sweet onion like Vidalia keeps the salad from tasting too sharp
- Extra virgin olive oil (3 tablespoons) – use a good quality bottle here, since the oil is a main flavor in the dressing
- Red wine vinegar (2 tablespoons) – brings the tang that balances the sweetness of the tomatoes and onion
- Dried oregano (1 teaspoon) – adds an earthy, herby note; swap in Italian seasoning if that’s what you have on hand
- Sea salt (1/4 teaspoon) – draws out the natural juices of the tomatoes and rounds out the dressing
- Ground black pepper (to taste) – adds a light bite that pairs perfectly with the acidity of the vinegar
Note: These amounts make about four servings, so if you are cooking for a bigger crowd or a smaller household, just scale the ingredients up or down while keeping the same ratios.
Variations to Try
- Swap red wine vinegar for balsamic vinegar if you want a slightly sweeter, richer dressing
- Use red onion instead of sweet onion for a sharper, more pungent bite
- Add crumbled feta or goat cheese for a creamy, tangy addition
- Toss in sliced cucumber or avocado for extra texture and freshness
- Leave out the cheese entirely to keep the salad dairy-free
- Mix in cooked pasta or corn kernels to turn this into a heartier side dish, similar to an Chicken Corn Chowder Recipe that transforms simple ingredients into a satisfying meal
Cooking Time
- Prep Time: 10 minutes
- Cooking Time: 0 minutes (no cooking required)
- Total Time: 10 minutes
Equipment You Need
- Cutting board – gives you a stable surface to slice tomatoes and onion
- Sharp knife – a serrated knife makes clean cuts through tomatoes without crushing them
- Small mixing bowl – for whisking together the dressing ingredients
- Medium mixing bowl – for tossing the tomatoes and onion with the dressing
- Whisk or fork – helps combine the oil and vinegar into a smooth dressing
How to Make Tomato Onion Salad?
This recipe comes together in just a few easy steps, and there is no stove or oven involved. I like to prep everything ahead of time so all I have to do is toss and serve. Here is exactly how I put this salad together every time.
Step 1: Whisk the Dressing
In a small bowl, combine the olive oil, red wine vinegar, oregano, salt, and pepper. Whisk everything together until it looks slightly thickened and well blended. This little dressing is what ties the whole salad together, so take a moment to taste and adjust it.
Step 2: Prep the Vegetables
Slice your tomatoes into wedges, or halve them if you are using smaller varieties like cherry tomatoes. Thinly slice the sweet onion so it distributes evenly throughout the salad. Place both into a medium mixing bowl.
Step 3: Toss Everything Together
Pour the dressing over the tomatoes and onion. Gently toss so every piece gets coated without breaking apart the tomato wedges. Taste it once more and add extra salt or pepper if needed.
Step 4: Serve Right Away
This salad tastes best when served immediately at room temperature. Tomatoes lose their texture in the fridge, so it is worth enjoying this one fresh rather than saving it for later, just as an Air Fryer Quiche Recipe is best enjoyed fresh from the kitchen.
Additional Tips for Making This Recipe Better
- I always make sure my knife is sharp before slicing tomatoes, since a dull blade tends to squish them instead of cutting cleanly
- I never refrigerate this salad before serving, because cold temperatures make the tomatoes lose their juicy texture
- I like to toss gently and slowly so the tomato wedges stay intact instead of turning mushy
- I taste my dressing before adding it to the vegetables, since the right balance of oil and vinegar makes or breaks this dish
- I try to use the ripest tomatoes I can find, because underripe ones just do not deliver the same flavor
How to Serve Tomato Onion Salad?
I love serving this salad in a wide, shallow bowl so the colorful tomatoes and onions are on full display. A sprinkle of fresh basil, parsley, or extra oregano right before serving adds a pop of green and a burst of fresh flavor.
Pair it alongside grilled chicken, fish, or a good loaf of crusty bread for a simple, well-rounded meal. It also works beautifully as a topping for bruschetta or alongside a cheese board at a summer gathering.
Nutritional Information
Here is a quick look at what you can expect per serving of this salad.
- Calories: 144 kcal
- Protein: 2 grams
- Carbohydrates: 11 grams
- Fat: 11 grams
Make Ahead and Storage
Make Ahead: You can slice the tomatoes and onion and whisk the dressing separately up to a day in advance. Just keep them apart until you are ready to serve, since combining them early causes the tomatoes to release too much liquid.
Refrigerating: This salad is really best enjoyed fresh, but if you have leftovers, they will keep in an airtight container in the fridge for about a day. Expect the tomatoes to soften noticeably once chilled.
Freezing: I would not recommend freezing this salad, since the tomatoes and onion will turn watery and mushy once thawed, losing the crisp texture that makes this dish so good.
Reheating: No reheating is needed here since this is a cold, fresh salad meant to be enjoyed as is straight after tossing.
Why You’ll Love This Recipe?
This salad has earned a permanent spot in my recipe rotation, and here is why it might become one of yours too.
- It comes together in just ten minutes, making it perfect for busy weeknights or last-minute get-togethers
- It uses simple pantry staples, so you likely already have everything you need on hand
- It is easy to customize with cheese, extra vegetables, or a different vinegar depending on your mood
- It fits naturally into dairy-free or low-carb eating plans without any extra effort
- It tastes fresh and vibrant every time, especially when made with ripe, in-season tomatoes
Tomato Onion Salad Recipe
Ingredients
Method
- In a small bowl, combine the olive oil, red wine vinegar, oregano, salt, and pepper. Whisk everything together until it looks slightly thickened and well blended. This little dressing is what ties the whole salad together, so take a moment to taste and adjust it.
- Slice your tomatoes into wedges, or halve them if you are using smaller varieties like cherry tomatoes. Thinly slice the sweet onion so it distributes evenly throughout the salad. Place both into a medium mixing bowl.
- Pour the dressing over the tomatoes and onion. Gently toss so every piece gets coated without breaking apart the tomato wedges. Taste it once more and add extra salt or pepper if needed.
- This salad tastes best when served immediately at room temperature. Tomatoes lose their texture in the fridge, so it is worth enjoying this one fresh rather than saving it for later.
Notes
- I always make sure my knife is sharp before slicing tomatoes, since a dull blade tends to squish them instead of cutting cleanly
- I never refrigerate this salad before serving, because cold temperatures make the tomatoes lose their juicy texture
- I like to toss gently and slowly so the tomato wedges stay intact instead of turning mushy
- I taste my dressing before adding it to the vegetables, since the right balance of oil and vinegar makes or breaks this dish
- I try to use the ripest tomatoes I can find, because underripe ones just do not deliver the same flavor
