In a large mixing bowl, combine the green cabbage, red cabbage, carrot, apple, and red onion.
In a separate small bowl, whisk together the apple cider vinegar, honey (or maple syrup), olive oil, salt, and pepper until well blended.
Pour the dressing over the cabbage mixture and toss thoroughly to coat all ingredients.
Allow the slaw to marinate for at least 15 minutes before serving to enhance the flavors.
Before serving, sprinkle with chopped fresh parsley for an added pop of color and flavor (optional).
Enjoy your crunchy slaw as a side dish or on top of sandwiches or tacos.