Prep the vegetables - Slice and chop the cabbage and the fennel. This is a manual process - you don't want it to be as finely shredded as it would be if you had used the food processor.
Toss the veg and the raisins - Toss the cabbage, fennel, and the raisins.
Make the dressing - Stir together the mayo, yogurt, lime juice, honey, celery salt, and white pepper.
Stir the dressing into the veg - Fold the dressing into the veg and raisins, and stir to combine. Let the slaw rest for a bit before serving, to give the flavors a chance to mellow and meld.