Instructions
Melt butter in a large saucepan over medium-low heat. Stir in flour until smooth and bubbly. Stir in salt & pepper. Gradually add milk, stirring until thick and bubbly. Add sliced potatoes to sauce. Cover and simmer for (approx) 8 min.Transfer mixture to a greased 12x8" baking dish. (sprinkle top with grated parmesan cheese if desired for a crispy crust) Bake uncovered at 375˚ for (approx) 45 min