If frozen, thaw the berries in the refigerator overnight or at room temperature for at least 3 hours.
Wash the berries thoroughly.
In a pot, add sugar and cornstarch. Whisk in all directions for at least 1 minute.
Gradually add water, whisking in all directions, until combined.
Add blueberries and whisk in all directions until well blended.
Over medium heat, bring to a boil, whisking frequently in all directions.
Thern, over high heat, boil for 3 minutes, whisking constantly in all directions.
Remove from heat and let cool for 30 minutes.
Add the lemon juice and and pass the composition through a mixer (blender) at high speed, until thick liquid consistency (about 2 minutes).
Bottle in small, clean, dry plastic bottles of approximately 250 ml and refrigerate or freeze.
NOTES:
This syrup is highly concentrated so use small quantities at a time for your smoothies, desserts or juices.
Can be stored in the refrigerator for up to 1 monthe and in the freezer for about up to 2 years.