Preheat the oven to 450 degrees. Coat a baking dish with cooking spray.
Cut the tomatoes in half, place them into the baking dish, drizzle the top with olive oil and balsamic vinegar then season with sea salt, freshly cracked pepper, and garlic powder to taste.
Place into the oven and roast for 35-40 minutes or until tender and juicy.
Remove from the oven then sprinkle the top with fresh basil before serving. Enjoy.