Cut the tomatoes into wedges. If they are large, slice them into bite-sized pieces.
Thinly slice the red onion into half-moons.
In a large serving bowl, combine the tomatoes and red onion.
Tear the fresh basil leaves, chopping them slightly if needed to keep the pieces manageable, and add to the salad.
Drizzle the olive oil over the vegetables. Add the dried oregano, salt, and pepper to taste.
Gently toss everything together to ensure the tomatoes, onions, and basil are well coated with olive oil and seasoning.
Notes
Onion Preparation: For a milder flavour, you can soak the red onion slices in cold water for about 10 minutes before adding them to the salad. Drain well before use.
Cucumbers: If you'd like to add cucumbers to the salad, thinly slice them and toss them with the tomatoes and onions. The cucumbers will add extra crunch and freshness to the dish.
Red Wine Vinegar: If you add cucumbers, a splash of red wine vinegar can elevate the flavour and add a pleasant acidity.
Tomato Tip: Avoid cutting the tomatoes too small or using tomatoes that are too ripe. Both of these mistakes can lead to a mushy salad.