Creamy Macaroni and Cheese

Cook macaroni according to package directions, omitting salt. Drain well; set aside.

Melt butter in a heavy saucepan over low heat; add flour, stirring until smooth.

Cook 1 minute, stirring constantly.

Gradually add milk; cook over medium heat, stirring constantly, until thickened and bubbly.

Stir in salt and cheese, stirring until cheese melts.

Gradually stir about 1/4 of hot mixture into beaten egg; add to remaining hot mixture, stirring constantly.

Stir cheese sauce into macaroni; pour into a lightly greased 1 3/4-quart baking dish.

Sprinkle with paprika, if desired.

Bake at 350° for 35 minutes.