Prepare the cabbage, kale and broccoli and combine them in a large bowl.
In a small bowl, whisk together the mayo, apple cider vinegar, honey, dijon mustard, salt, pepper and celery seeds.
Pour the dressing over the greens and mix until combined.
Cover and put in the fridge until you are ready to serve (at least 30 mins).
You can make this salad the day before by mixing in half of the dressing and reserving the other half until you are ready to serve.