1 large head of cabbage, finely shredded
1 medium sweet onion, finely chopped
2 carrots, grated
1 cup sugar
1 teaspoon salt
2/3 cup vegetable oil
1 teaspoon dry mustard
1 teaspoon celery seed
1 cup cider vinegar
Combine coleslaw vegetable ingredients; chopped cabbage, chopped bell pepper, chopped onions, and grated carrots in a large serving bowl.
In a saucepan over medium heat, combine remaining ingredients; bring to a boil. Simmer, stirring, until sugar is dissolved; pour over vegetables and toss well. Cover and refrigerate until thoroughly chilled.
Enough slaw for 8 to 10 servings.