Preheat oven to 450. Combine cabbage, onion, oil, sugar, pepper, and salt in a large bowl. Toss to coat. Divide cabbage mixture between 2 foil-lined jelly -roll pans.
Bake at 450 for 20 minutes, stirring and rotating pans after 10 minutes.
In the same bowl used for the cabbage, combine carrots, vinegar and hot sauce; toss to coat. Remove cabbage from oven and carefully transfer to the bowl with the carrots. Add butter or lightly spray with butter cooking spray, toss to combine.
Heat broiler to high. Return cabbage mixture to pans, spreading evenly. Place each pan under the broiler for 3 minutes or until edges begin to brown and evenly crisp.
Yield: 8 servings (serving size 3/4 cup)