Cut the avocados in half and remove the pit.

In a mixing bowl, combine quartered cherry tomatoes, diced mozzarella, and chopped basil. Add salt, pepper, and balsamic glaze, and toss gently.

Spoon the tomato and mozzarella mixture into each avocado half.

Drizzle with olive oil if desired.

Arrange the stuffed avocados on a plate and serve.