Scalloped Potatoes

4 T butter
4 T flour
2 cups milk
1/2 cup shredded cheddar cheese
1 t salt
1/2 t Worcestershire sauce
1/4 t pepper
4 medium potatoes, peeled and thinly sliced
Paprika, optional

In a small saucepan, melt butter; add flour.  Stir until smooth.  Gradually add milk.  Bring to a boil; cook and stir for 2 minutes or until thickened.  Reduce heat; add cheese, salt, Worcestershire sauce and pepper.  Cook and stir until cheese is melted.  Place potatoes in a greased 2-qt dish.  Top with sauce.  Cover and bake at 350 for 25 minutes.  Uncover; bake 20 minutes longer or until potatoes are tender.  Sprinkle with paprika.