De-seed and dice tomatoes; drain in a colander for 5–10 minutes to remove excess moisture.
In a bowl, toss tomatoes with minced garlic, basil, olive oil, balsamic, salt, and pepper.
Preheat oven to 400°F (200°C) or heat a grill pan.
Brush bread slices with olive oil and toast until golden brown (about 2–3 mins per side).
While bread is hot, rub the surface of each slice with the cut side of the halved garlic clove.
Top each slice with a generous spoonful of the tomato mixture.
Drizzle with extra balsamic glaze if desired and serve immediately.