In a large bowl, place the shredded cabbage, carrots, onion and parsley. Toss together with your hands.
In a medium bowl, mix together all the slaw dressing ingredients. Let sit a few minutes to allow the sugar and salt to dissolve. Taste for balance and adjust to your liking.
Smear approximately 2/3 of the dressing over the top of the mixed cabbage. Fold to mix well. Add as much remaining dressing as you desire.
Allow the dressed slaw to sit for at least an hour before serving.