This classic creamy coleslaw delivers the perfect crunch for your next barbecue or picnic. It combines shredded green cabbage with crisp bell peppers, celery, and sweet yellow onion. The dressing brings everything together using a simple mix of mayonnaise, apple cider vinegar, and yellow mustard for a tangy finish. Letting it chill in the fridge ensures the flavors meld beautifully while keeping the vegetables crisp and refreshing.