Create a balsamic reduction by pouring a bottle of Balsamic vinegar into a small pot and boil gently for 20-25 minutes, until it creates a thick but pourable sauce. Set aside.
Slice tomatoes & mozzarella into thick slices and arrange on a plate. Sprinkle on a pinch of salt and pepper.
Add a basil leaf or two for each piece of tomato and mozzarella.
Drizzle the dish with olive oil and the balsamic reduction and enjoy!