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Italian Tomato Summer Salad With Onion

This light, vibrant Italian Tomato Summer Salad combines ripe, juicy tomatoes, thinly sliced onions, fragrant basil, and a simple olive oil dressing. Inspired by classic insalata di pomodori, it’s a no-cook, 10-minute side dish that’s bursting with flavor. Perfect for picnics, antipasti platters, or weeknight meals, it’s a summer essential you’ll make on repeat.
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Appetizer, Salad, Side Dish
Cuisine Italian, Mediterranean
Servings 4
Calories 130 kcal

Equipment

  • Cutting board and sharp knife
  • Mixing bowl
  • Small whisk or fork (for dressing)
  • Colander (for soaking onions, optional)
  • Serving platter or shallow bowl

Ingredients
  

  • 4 large ripe tomatoes (heirloom, vine-ripened, or beefsteak), cut into wedges or thick slices
  • ½ medium red onion, thinly sliced
  • 2–3 tbsp extra virgin olive oil
  • 1 tbsp red wine vinegar or fresh lemon juice
  • Salt and freshly ground black pepper, to taste
  • A handful of fresh basil leaves, torn

Optional:

  • ½ tsp dried oregano or fresh parsley
  • 1 garlic clove, halved (for bowl rubbing)
  • Capers, olives, or mozzarella (as garnish)

Instructions
 

Prep Onions (optional but recommended):

  • Place thinly sliced red onions in a bowl of ice water or vinegar for 10 minutes to soften their sharpness. Drain and pat dry.

Slice Tomatoes:

  • Cut tomatoes into wedges or thick rounds. Transfer to a mixing bowl or shallow serving dish.

Make Dressing:

  • In a small bowl, whisk together olive oil, red wine vinegar (or lemon juice), salt, and pepper.

Assemble Salad:

  • If using, rub the inside of your bowl with a halved garlic clove for subtle flavor.Add tomatoes and onions to the bowl. Drizzle with dressing. Toss gently to avoid bruising the tomatoes.

Add Herbs & Rest:

  • Tear basil leaves over the salad and sprinkle any optional herbs or add-ins. Let sit for 10 to 30 minutes at room temperature for best flavor.

Serve:

  • Serve as is, or with crusty Italian bread to soak up the delicious juices.

Notes

  • Tomato tip: Use the ripest tomatoes you can find—this salad depends entirely on their flavor.
  • Onion swap: Sweet onions or shallots also work well; soaking is key to reducing harshness.
  • Make-ahead: Assemble up to 1 hour in advance. If prepping further ahead, store the dressing separately and toss just before serving.
  • Leftovers: Best enjoyed fresh, but leftovers can be added to pasta, bruschetta, or grain bowls.
  • Serving temp: Always serve at room temperature for the best taste and texture.
Keyword fresh tomato side, insalata di pomodori, Italian tomato salad, no-cook salad, summer salad, tomato and onion salad, vegan Italian recipe