Docks Coleslaw

Ingredients

• 1/2 green apple, peeled and cored
• 1/2 green bell pepper, seeds removed
• 1 stalk celery, coarsely chopped
• 1/4 cup cider vinegar
• 1 1/2 tablespoons sugar
• 1 teaspoon celery seed
• 1 teaspoon caraway seed
• 1/2 teaspoon garlic powder
• 1/2 teaspoon onion powder
• 1/2 teaspoon freshly ground black pepper
• 1 1/2 teaspoons kosher salt
• 1 cups mayonnaise (preferably homemade)
• 1/2 cup buttermilk
• 1 medium (about 2 1/2 pounds) green cabbage, quartered, cored and very finely sliced
• 1 1/2 cups shredded red cabbage
• 1 carrot, shredded