Bowl, Combine Vinegar, Mayonnaise, Minced Onion, Lemon Juice, Sugar, Celery Seed, Salt (If Desired) & Pepper.Mixing Them Well & Pour Dressing Over Cabbage Mixture. Toss The Slaw And Chill It For At Least 2 Hours, Tossing It Again Just Before Serving. Dressing Is Excellent With Other Salads.