Cook macaroni according to package directions; drain.
Meanwhile, in another saucepan, melt butter over medium heat.
Stir in flour until smooth; gradually whisk in milk.
Bring to a boil, stirring constantly. Cook and stir for 2 minutes or until thickened.
Add cheese; cook and stir until melted.
Stir in macaroni and sausage.
Enjoy.
