In a heavy bottomed sauce pan bring sugar and water to a boil until sugar has melted.
To the pan add blueberries, zest of 1 lemon and 1 tablespoon of lemon juice.
Bring to a simmer over medium heat.
Stirring occasionally simmer until blueberries have burst and sauce begins to thicken, about 8-12 minutes. See Note #1 Below
Let cool to room temperature. The sauce will thicken as it cools.
Notes
Recipe NotesNote #1- Frozen berries will take longer to cook whereas the fresh berries will be done around the 8 minute marker.Note #2- See above in post for flavor and sweetness variations.