Cut the tomatoes in half and, if needed, use a spoon or your fingers to gently remove the clumps of watery seeds. Turn the tomatoes, cut side down, on the cutting board, and dice into ½-inch pieces.
Place the diced tomatoes in a medium mixing bowl, add in 1½ tablespoons olive oil, salt, and a dash of black pepper. Finely grate 1 clove of peeled garlic over the tomatoes (using a Microplane grater or garlic press). Gently toss to combine, then let sit at room temperature for 15-30 minutes to marinate.
Meanwhile, slice the baguette into ½-inch thick slices on the diagonal. Place the slices on a baking sheet and lightly brush each side with the remaining olive oil. Bake for 5 minutes, flip, then continue to bake for 3-5 minutes until golden on both sides.
Remove the toasted bread from the oven, carefully rub each slice with the remaining peeled clove of garlic, and set aside.
Drain off any liquid that may have accumulated in the tomato mixture, fold in the ribbons of basil, and gently toss to combine. Give the mixture a quick taste to adjust seasonings if needed.
Spoon the tomato mixture over the toasted bread and serve immediately. Alternatively, serve the toasted bread and tomatoes in separate dishes and allow guests to serve themselves.
Notes
Tomatoes: Use the freshest, ripest tomatoes possible. If you are making this outside the summer months, or when tomatoes are not in season, use grape or cherry tomatoes, which have good flavor year-round. Olive Oil: Look for extra-virgin olive oil labeled cold-pressed and originating from a single country for the best flavor. Storage: Tomato Bruschetta is best served within two hours of preparation. If you happen to have leftover tomato topping, you can store it in an airtight container in the refrigerator for up to 48 hours.