Prepare sauce according to directions with 1 3/4 cups milk & omit butter.
In a large skillet, heat sausage. Remove from pan, drain and cut into quarters.
In skillet, over medium-low heat cook cabbage, covered, stirring occasionally, until almost tender, 15-20 minutes.
Meanwhile, in a large bowl whisk together 1/4 cup sauce & remaining milk. Add sausage, cabbage and potatoes; toss until coated. Transfer to baking dish. Spoon remaining sauce over top & spread evenly. Sprinkle with cheese. Bake 25 minutes, or until hot & bubbly. Let stand 10 minutes before serving.