Chicken salad is any salad with chicken as a main ingredient. Other common ingredients may include mayonnaise, hard-boiled egg, celery, onion, pepper, pickles (or pickle relish) and a variety of mustards. In Europe and Asia the salad may be complemented by any number of dressings, or no dressing at all, and the salad constituents can vary from traditional leaves and vegetables, to pastas, couscous, noodles or rice.