
Preheat your oven to 375°F (190°C). Lightly grease a baking dish.
In a large bowl, combine the diced tomatoes, Kalamata olives, red onion, minced garlic, olive oil, oregano, basil, salt, and pepper. Mix well to ensure all ingredients are evenly coated.
Transfer the tomato mixture to the prepared baking dish, spreading it evenly.
Crumble the feta cheese evenly over the tomato mixture.
Bake in the preheated oven for 35-45 minutes, or until the tomatoes are softened and the feta cheese is lightly golden.
Remove from the oven and let it cool slightly before serving.
Garnish with fresh basil leaves and a drizzle of extra olive oil, if desired. Serve warm with crusty bread.