This is incredibly easy to make with only three ingredients, and it is quite versatile. My husband puts it on his greek yogurt, I put it on crepes and pancakes, and now we are topping keto cheesecake with it.
18 oz fresh blueberries
1/2 cup water
1/4 cup sugar substitute (I used swerve)
In a saucepan over medium heat, add all ingredients. Simmer until desired consistency; approximately 30 minutes. Stir occasionally. It will thicken a bit as it cools.