Dressing: Zest the lemon and squeeze the juice into a container with a tight fitting lid. Add the balsamic, zest, mustard, and anchovy paste. Finely chop the parsley and add it to the jar. Mince the garlic on a cutting board. Add the salt and continue to chop/smash until a paste forms. Add this to the jar. Pour in the olive oil and a few grinds of fresh ground pepper. Shake vigorously until mixture is completely blended.