Prepare ingredients – Slice the mozzarella, drain excess oil from sun-dried tomatoes, and chop basil if needed.
Toast the bread (optional) – Brush with olive oil and toast until golden. For extra flavor, rub with a garlic clove.
Assemble the sandwich – Layer mozzarella, sun-dried tomatoes, and basil on four slices of bread. Drizzle with balsamic glaze.
Top and finish – Place the remaining bread slices on top. Press lightly and drizzle a little more olive oil if desired.
Serve and enjoy – Cut in half and serve with soup, salad, or chips.