01 - Preheat the oven to 400°F and line a baking sheet with parchment paper.
02 - Toss the halved tomatoes with 2 tablespoons olive oil, ½ teaspoon sea salt, and ¼ teaspoon black pepper, then spread cut side up on the prepared baking sheet.
03 - Roast the tomatoes for 20 to 25 minutes until soft and beginning to caramelize, then remove from the oven and let cool slightly.
04 - Brush both sides of the bread slices with 2 tablespoons olive oil and place on a separate baking sheet; toast in the oven for 6 to 8 minutes, turning once, until golden and crisp.
05 - While still warm, gently rub one side of each toasted slice with the peeled garlic cloves.
06 - In a bowl, gently combine the roasted tomatoes with chopped basil and optional balsamic vinegar; adjust seasoning to taste.
07 - Spoon the tomato mixture onto the garlicky toast slices, garnish with additional basil, a drizzle of olive oil, and a sprinkle of salt and pepper as desired, then serve immediately.