Blueberry Maple Syrup

1     cup pure maple syrup
1½  cups fresh blueberries
1       pinch kosher salt
1       pinch grated orange zest (optional)

1. Put all ingredients in a small saucepan
set over medium heat. Bring to a boil; reduce
heat to maintain a strong simmer to allow the
mixture to thicken slightly, about 5 minutes.
2. Strain, if desired, and serve.