Preheat the oven to 375ºF (190ºC) and line a baking sheet with parchment paper.
Slice your baguette into ½” slices and place them on the lined baking sheet. Brush each of the slices with olive oil, then sprinkle with flaky salt to your taste.
Toast the bread in the oven for 9-11 minutes, or until golden brown with crispy edges. Alternatively, you can grill your bread until crisp.
Add the diced tomato, balsamic vinegar, olive oil, parmesan cheese, basil, garlic, salt, and pepper to a medium-sized bowl. Stir together until well combined. Taste and adjust salt and pepper to your preference.
Spoon a small amount of the tomato mixture on top of a piece of bread, then drizzle with a small amount of balsamic glaze (if desired).
Serve and enjoy!