Butter 9x9 inch baking dish
Peel and slice potatoes into 1/8 inch thick rounds.
Drop sliced potatoes into boiling pot of water. Leave in hot water with burner on for 5 minutes. This partially cooks and removes some starch from potatoes. Do not skip this step!
Drain and rinse potatoes in cool water.
Pat potatoes dry.
Form 3 layers in baking dish. Potatoes first, then onions, flour, and cheese on each layer. A little parmesan cheese on top layer is yummy!
Cover baking dish completely with foil and bake at 350 for 45 minutes. Then uncover and bake for another 15 to 30 minutes at 425. Potatoes will be tender when done and milk will have cooked into the potatoes for the most part.
Cheese is melted and potatoes have formed a slight crust. Done to perfection!
