Chicken-Broccoli Salad with Buttermilk Dressing

In a large bowl combine the broccoli slaw mix, chicken, dried cherries, celery, and red onion. In a small bowl whisk together buttermilk, mayonnaise, honey, vinegar, dry mustard, salt and pepper. Pour buttermilk mixture over broccoli mixture; toss gently to combine. Cover and chill at least 2 hours or up to 24 hours before serving.

Just before serving, add baby spinach and toss gently to combine.