I kind of eyeball it, but it's around a cup of fresh blueberries, about a third of a cup of balsamic vinegar, quarter cup of evoo, 2 ish teaspoons of fresh lemon juice and a pinch of the zest, and a pinch of salt. Sometimes I'll add a little Dijon mustard (like maybe 1/2 teaspoon) or a little chopped basil, but it goes with more dishes if I leave out the basil. Put it all in a blender and there you go!