Directions:

Heat oven to 350 F. Cook and drain macaroni as directed on package.

While macaroni is cooking, melt butter in 3-quart saucepan over low heat. Stir in flour, salt, pepper, mustard and Worcestershire sauce. Cook over low heat, stirring constantly, until mixture is smooth and bubbly; remove from heat.

Stir in milk. Heat to boiling, stirring constantly. Boil and stir 1 minute; remove from heat. Stir in cheese until melted. Gently stir macaroni into ungreased 2-quart casserole. Bake uncovered 20 to 25 minutes or until bubbly.