Add the balsamic vinegar, garlic clove and cherries to a small saucepan.
Bring the ingredients to a boil and then reduce to a simmer.
Simmer for about 30 minutes. Stir once.
Once the liquid has reduced by about half, remove the pan from the heat.
Allow the balsamic reduction to cool.
Use a slotted spoon and remove the garlic clove and cherries.
Pour the reduction into a sealed container
Notes
I added 1 garlic clove and a handful of black cherries to my balsamic vinegar as it was cooking down. This is completely optional. The additional flavor options are limited only to your imagination and your tastebuds.