Add blueberries and water to a small pot. Heat on high heat and bring to a boil. Reduce heat to medium, cover, and let simmer for 5 minutes.
Pour cooked blueberries and water into a blender. Add all other ingredients. Blend until completely smooth.
Taste. Add a smidge more orange juice if you prefer a sweeter flavor. I like mine as is because I tend to load my salad up with fruit so I don't want an overly sweet dressing.
You can serve immediately (it will be warm) or place in the refrigerator in a sealed container to allow the dressing to cool before serving.
Notes
Do not use EVOO. It's too thick and oily for most dressings. A light olive oil will blend beautifully.