Instructions: 1. Bring a large saucepan of water to a boil. Add the macaroni and cook according to the package directions. Drain in a colander.

2. Meanwhile, in a medium-size nonstick saucepan, whisk together the milk and cornstarch until blended. Bring to a boil over medium-high heat, stirring often.

3. Stir in the mustard, salt, and pepper. Reduce the heat to low and simmer for 1 minute, or until thickened.

4. Stir in the cheese until melted. Stir in the macaroni and heat through.

5. Serve right away.

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