-
1. Melt butter. Add flour and stir while cooking over low heat until golden brown. Add milk. Stir until thickened. If necessary, add more milk. Add dry mustard, A-1, salt, and pepper. Stir well. Reduce heat to low.
-
2. Peel and slice potatoes into thin, even ovals. Lay into a greased or pammed 10×13 pan. Pour sauce over potatoes. You may not need it all. Reserve extra for mac-n-cheese tomorrow. Sprinkle cheddar cheese over top.
-
3. Bake at 350 for 35-45 minutes, or until potatoes are tender and everything is melted and delicious.