Add the balsamic vinegar to a small saucepan. Heat to a gentle boil, reduce heat and simmer for 10 minutes or until reduced by half. Remove from heat and let cool.
Caprese Salad
Meanwhile, add the tomatoes to a serving platter or bowl, cutting the larger ones in half. Add the fresh mozzarella and basil. Toss to combine. Drizzle with the cooled balsamic glaze.