Prepare the vegetables: Peel and julienne the beets and apple. Shred the red and green cabbage.
Mix the base: In a large bowl, combine beets, apple, red cabbage, green cabbage, and parsley (if using). Toss lightly.
Make the dressing: In a small bowl, whisk together lemon juice, apple cider vinegar, olive oil, honey, salt, pepper, and optional spices.
Combine: Pour the dressing over the slaw and toss until everything is evenly coated.
Let it rest: Allow the slaw to sit 5–10 minutes so the flavors meld and the cabbage softens slightly.
Serve: Enjoy chilled or at room temperature.