Quarter the tomatoes and place them into a small bowl.
Add 2 tablespoons of olive oil, the balsamic vinegar, salt, and pepper to the tomatoes, then stir.
Chiffonade the basil by stacking the leaves in a pile. Roll the basil leaves vertically like a cigar. Starting at one end, make slices along the rolled basil leaves, making ribbons. Sprinkle the basil into the bowl of tomatoes. Stir well and set aside to marinate.
Slice the baguette in half horizontally, and slice the halves in half again vertically. Place the baguette on a baking sheet and brush with the 2 remaining tablespoons of olive oil. Place in the oven and bake for 8 minutes.
Remove the baguette from oven and rub each slice with the clove of garlic.
Cut the baguette into the desired number of pieces and top with the tomato mixture, then serve.