01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - Toss halved tomatoes with 2 tablespoons olive oil, ½ teaspoon sea salt, and ¼ teaspoon freshly ground black pepper. Spread evenly on the prepared baking sheet, cut side up.
03 - Roast for 20 to 25 minutes until tomatoes soften and start to caramelize. Remove from oven and allow to cool slightly.
04 - Brush both sides of bread slices with 2 tablespoons olive oil. Place on a separate baking sheet and toast in the oven for 6 to 8 minutes, turning once, until golden and crisp.
05 - While toast is still warm, gently rub one side of each slice with peeled garlic cloves to impart flavor.
06 - In a bowl, gently combine roasted tomatoes with chopped basil and balsamic vinegar if using. Adjust seasoning with salt and pepper to taste.
07 - Spoon the tomato mixture onto the garlicky toasts. Garnish with extra basil, a drizzle of olive oil, and additional salt and pepper if desired. Serve immediately.