Step 1

In a small skillet, heat 2 tablespoons of olive oil and the garlic over medium-low heat until the garlic is very fragrant, about 2 to 3 minutes. (Do not brown the garlic.) Remove from heat and transfer to a medium mixing bowl to cool for a few minutes.

Step 2

To the cooled garlic oil, stir in the tomatoes, basil, vinegar, salt, and pepper. Let marinate for at least 30 minutes and up to 4 hours.

Step 3

Preheat the oven to 400°F. Lightly brush both sides of the baguette slices with the remaining 1 tablespoon of olive oil and place on a baking sheet in a single layer. Toast the bread until golden brown, about 12 minutes, turning halfway through baking.

Step 4

Top the toast baguette slices with the marinated tomatoes and serve immediately.