In a large mixing bowl, combine the shredded green cabbage, shredded red cabbage, shredded carrots, and sliced green onions.

In a separate bowl, whisk together the Greek yogurt, apple cider vinegar, honey, Dijon mustard, salt, and black pepper until smooth.

Pour the dressing over the vegetable mixture and toss until everything is well coated.

Taste and adjust seasoning if necessary.

Chill in the refrigerator for at least 30 minutes before serving for best flavor.