In a medium saucepan pour in balsamic and blueberries and set heat to medium.
Stir and cook for 4-5 min.
Once ingredients begin to boil, reduce heat to low (uncovered) and add all remaining ingredients. Stir and smash blueberries with a spoon. Reduce for 25 min or until sauce has reduced to half and thickened.
Remove from heat and let cool. Store in a glass, airtight container for up to 2 weeks in the fridge. Heat slightly before adding to fish or pork.
Can also be used to make popsicles or can be spooned over ice cream.
Recipe by Sweet Is The Spice at https://sweetisthespice.com/recipes/condiments/blueberry-maple-balsamic-reduction/