Arrange beef on bread slices. Top with cheese. Broil about 2 minutes more or until cheese is melted. Meanwhile, heat a large skillet over medium heat. Add coleslaw mix, the water, and caraway seeds to hot skillet. Cover and cook for 2 to 3 minutes or until cabbage is wilted, stirring once or twice. Remove from heat. Stir in mayonnaise and cider vinegar.