Preheat the oven to 375°F (190°C).
In a large mixing bowl, combine the cooked rice, chopped tomatoes, diced cucumber, thinly sliced red onion, crumbled feta cheese, and halved Kalamata olives.
In a small bowl, whisk together the extra virgin olive oil, red wine vinegar, dried oregano, salt, and pepper.
Pour the dressing over the rice mixture and toss to coat everything evenly.
Transfer the mixture to a baking dish and spread it out in an even layer.
Bake in the preheated oven for 35-40 minutes, or until the top is golden brown and crispy.
Remove from the oven and let it cool for a few minutes before serving.
Garnish with fresh herbs, if desired, and enjoy!