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A fresh Best Tomato Onion Salad with chopped herbs in a white bowl.

Best Tomato Onion Salad

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A refreshing, simple, and delicious tomato and onion salad that embodies summer with vibrant flavors from ripe tomatoes, red onions, fresh herbs, and a tangy vinaigrette. Perfect for any occasion, from weeknight dinners to backyard barbecues.

  • Total Time: 15 minutes
  • Yield: 4 servings 1x

Ingredients

Scale

45 medium ripe tomatoes (Roma, beefsteak, or heirloom)

1 medium red onion

¼ cup fresh parsley, finely chopped

3 tablespoons extra virgin olive oil

12 tablespoons red wine vinegar

½ teaspoon salt

¼ teaspoon black pepper, freshly ground

¼ cup crumbled feta cheese (optional)

½ English cucumber, peeled and diced (optional)

Instructions

1. 1. Prepare the Tomatoes: Wash, core, and slice tomatoes into wedges or rounds. Place in a large mixing bowl.

2. 2. Slice the Onion: Peel and slice red onion very thinly (paper-thin). Add to the bowl with tomatoes.

3. 3. Chop the Herbs: Wash and pat dry fresh parsley; finely chop. Add to the bowl.

4. 4. Prepare the Dressing: In a small bowl, whisk together olive oil, red wine vinegar, salt, and black pepper. Taste and adjust.

5. 5. Combine and Toss: Pour dressing over vegetables and herbs; gently toss to coat evenly.

6. 6. Serve: Let rest 10-15 minutes for flavors to meld. Serve immediately.

Notes

Pro Tips: Use very ripe, firm tomatoes for best flavor. Soak sliced red onion in ice water 10-15 minutes to reduce pungency. Use high-quality extra virgin olive oil. Season generously and taste. Best served fresh; leftovers keep in an airtight container in fridge for 1-2 days. Do not freeze or reheat.

  • Author: Charlotte Johnson
  • Prep Time: 15 minutes
  • Cook Time: 0 minutes
  • Category: Salad
  • Method: No-cook, toss
  • Cuisine: American, Mediterranean-inspired
  • Diet: Vegetarian, Gluten-free, Vegan (if feta omitted), Dairy-free (if feta omitted)

Nutrition

  • Serving Size: 1 serving (about 1 cup)
  • Calories: 150
  • Sugar: 6g
  • Sodium: 320mg
  • Fat: 11g
  • Saturated Fat: 2g
  • Unsaturated Fat: 8g
  • Trans Fat: 0g
  • Carbohydrates: 11g
  • Fiber: 2g
  • Protein: 2g
  • Cholesterol: 5mg (if feta included) or 0mg (if feta omitted)