Step 1

In a medium saucepan, whisk together the sugar, cornstarch and salt. Stir in water, lemon juice and blueberries.

Step 2

Bring to a boil over medium-high heat, stirring frequently, until mixture begins to thicken. Cook and stir for 2-3 minutes more. Remove from heat and stir in vanilla.

Step 3

May be served warm over waffles, pancakes etc. Cool completely before using on cakes, cheesecakes, yogurt, etc. Store in an airtight container in the refrigerator for up to one week.