The main ingredient of a traditional Greek salad is tomatoes. A typical Greek salad, known as "Horiatiki," includes fresh tomatoes, cucumbers, red onions, olives, and feta cheese, often dressed with olive oil, oregano, and vinegar. Tomatoes provide a juicy, fresh flavor and vibrant color, making them a staple in this salad. The dish is known for its simplicity and uses fresh, high-quality ingredients, reflecting the Mediterranean diet's emphasis on seasonal produce. It serves as a refreshing accompaniment to many Greek meals and is cherished for its nutritious value and delicious taste.