Heat all the ingredients but for the last three in a saucepan.
Simmer for 15 minutes (you’re looking for a glaze-like consistency).
Taste test and adjust for personal preferences.
Assemble the skewers: tomato at the base, followed by basil, then mozzarella.
Repeat until you run out.
Put on a serving tray.
Drizzle with the balsamic mix.
Put extra balsamic in a container for people who want extra.