This might be what you are looking for but I am not sure. I got this from Martha Stewart's Program Guide (a week or so ago). Hope someone else can help you if it is not it.

BIG BOB GIBSON MUSTARD SLAW
Serves 20

Choose a cabbage with fresh, crisp, firmly packed leaves; the head should be heavy for its size.

2 medium heads green cabbage (about 4 pounds each), cored and shredded
1 large white onion, shredded
1 green bell pepper, seeded, deveined, and shredded
1 large carrot, peeled and shredded
1 large rib celery, shredded
3/4 cup apple cider vinegar
3/4 cup prepared yellow mustard
1/2 cup ketchup
1/2 cup sour cream
1/4 cup mayonnaise
1 tablespoon coarse salt
1/2 teaspoon cayenne pepper
1 1/4 cups sugar, or to taste

1. In a large bowl, add cabbage, onion, bell pepper, carrot, and celery. Mix to combine. 2. In a small saucepan, combine vinegar, mustard, ketchup, sour cream, mayonnaise, salt, and cayenne pepper. Bring to a boil, whisking frequently. Pour over cabbage mixture. Add sugar, and stir to combine. Cover with plastic wrap, and chill.