8 lg. potatoes, peeled and sliced
1 lg. onion, sliced
1/4 c. butter
1/2 c. all-purpose flour
1/2 tsp. dry mustard
2 c. milk
1 tsp. worcestershire sauce
4 c. (1 lb.) shredded sharp cheddar cheese
1/4 c. bread crumbs
Paprika

Cook potatoes and onion in a small amount of boiling salted water about 10 to 12 minutes or until tender; drain well. Melt butter in a large heavy saucepan over low heat; add flour and mustard, stirring constantly. Gradually add milk; cook over medium heat, stirring constantly until thickened and bubbly. Add worcestershire sauce and cheese, stirring until cheese melts. Alternate layers of potato onion mixture and cheese sauce in a lightly greased 2 quart shallow casserole dish. Top with bread crumbs and sprinkle with paprika. Bake at 350 minutes or until bubbly. Yield: 10 servings.