Awesome Cole Slaw

Ingredients

• 1 1/4 cups sour cream
• 3/4 cup mayonnaise
• 2 tablespoons prepared horseradish
• 1/4 cup cider vinegar
• 1/2 teaspoon salt
• 1/2 teaspoon celery seed
• 1/2 teaspoon pepper
• 1/2 teaspoon sugar
• 1/4 cup finely diced red onion
• 1 cup chopped granny smith apple
• 1/2 cup crumbled blue cheese
• 1 small savoy cabbage, shredded
• 1 small red cabbage, shredded
• 1 cup chopped toasted walnuts or 1 cup pecans, for garnish