Directions

1. In a medium saucepan melt butter over medium-high heat. Stir in flour to form a roux. Stir in mustard, and gradually stir in milk; cook and stir 4 to 6 minutes or until mixture begins to bubble. Season with pepper to taste.
2. Slowly add Cheddar and Parmesan, stirring continuously until cheese melts.
3. Meanwhile, cook macaroni al dente according to package directions; drain; return to pot. Stir in broccoli. Carefully pour cheese mixture over macaroni and broccoli; stir to coat. Serve immediately.