2 pounds green cabbage (about 1 small or 1/2 large cabbage)
1 medium onion
1/2 cup mayonnaise
1/4 cup mustard
2 teaspoons apple cider vinegar
1 cup sugar
Freshly ground black pepper 1/2 teaspoon cayenne pepper
Quarter and core the cabbage. Peel the carrots and onion and cut into pieces that will fit through the feed tube of a food processor. Fit the food processor with the grater attachment and push the cabbage, carrots and onion through the feed tube to grate. Toss the grated vegetables in a large bowl.
Prepare the coleslaw dressing by whisking together the mayonnaise, mustard, cider vinegar, sugar, 1 teaspoon black pepper and the cayenne in a medium bowl. Toss the dressing with the cabbage mixture and season with salt and pepper. Cover with plastic wrap and chill at least 2 hours before serving.