A luscious and versatile blueberry sauce perfect for desserts.
In a small bowl, combine the all-purpose flour and granulated sugar.
Mixing the dry ingredients first ensures even distribution.
In a heavy saucepan, combine the fresh and frozen blueberries with the filtered water and bring to a boil over medium heat.
Stir occasionally to prevent sticking and ensure even cooking.
Gradually add the flour and sugar mixture to the boiling blueberries, stirring constantly to avoid lumps.
Adding the mixture slowly helps maintain a smooth consistency.
Cook the mixture until it thickens to your desired consistency, then remove from heat.
The sauce will continue to thicken slightly as it cools.
Stir in the freshly squeezed lemon juice and let the sauce cool slightly before serving.
Adding lemon juice at the end preserves its fresh flavor.
Serve the sauce warm or chilled over your favorite desserts like cheesecake, pancakes, or ice cream.
For a decorative touch, garnish with a few fresh blueberries or a sprig of mint.