In a small saucepan, combine the blueberries, water, and fresh lemon juice.
Place the saucepan over medium-high heat and bring the mixture to a gentle simmer.
Cook while stirring occasionally until the berries begin to burst and release their juices.
Taste the mixture and decide if additional sweetness is needed.
Add sugar, honey, or your preferred natural sweetener if desired.
Continue simmering until most of the liquid has reduced and the mixture thickens into a syrupy consistency.
Remove from heat and allow the mixture to cool completely.
Spoon the blueberry mixture over yogurt and gently swirl to create a beautiful Blueberry Swirl Yogurt.
Store the remaining blueberry topping in a mason jar or airtight container.