1. Combine cabbage, onions, carrot, salt and 1/2 cup SPLENDA® Granulated Sweetener in a large bowl. Set aside.
2. Whisk together the remaining 1/2 cup SPLENDA® Granulated Sweetener, oil, vinegar, dry mustard, and celery seeds in a small saucepan; bring mixture to a boil over medium-high heat. Pour hot mixture over cabbage mixture, tossing to coat.
3. Cover and chill one-hour or overnight.