Step 1

In a medium saucepan over medium heat, combine the blueberries, 1/2 cup of water, sugar and lemon juice. Stir frequently, and bring to a low boil.

Step 2

In a small bowl, whisk the cornstarch with 2 tablespoons of cold water.

Step 3

Slowly stir the cornstarch into the blueberries, taking care not to crush the blueberries. Simmer until the homemade blueberry sauce is thick enough to coat the back of a metal spoon, about 5 minutes.

Step 4

Remove from heat and gently stir in vanilla and lemon zest.