Slice tomatoes in half and deseed (if desired) and then dice into small even sized pieces. Add to a medium-sized bowl. Add onion, garlic, basil, and salt and mix well. Add balsamic vinegar and olive oil and mix well. Cover and store in the fridge for at least 30 minutes before serving, and up to 1 day.
Preheat oven to 450 degrees F.
Slice baguettes 1" thick, on an angle and line on a baking sheet. Lightly brush each slice with olive oil.
Bake on the middle rack of the oven for 6-9 minutes. Remove from the oven and slice the 1/3 top of the reserved garlic clove off and gently rub garlic on each slice (if desired).
Remove the tomato mixture from the fridge and give a good mix. Top with tomato mixture and serve!
Notes
The nutritional value is approximately per slice. StorageTop the toasted baguette slices with the tomato mixture just before serving, but you can make the tomato mixture 1 day in advance and store in the fridge. SubstitutionsBread: Toast any slices of your favorites cut into bite-sized pieces. Tomatoes: Romas are really the best for this recipe, but another tomato will work, too!Balsamic and Olive Oil: This is the time to use the good stuff! Kosher Salt: If using regular table salt, reduce to 1 teaspoon.