Originally Posted by
maviskw
No need to make a sauce. Layer sliced potatoes, onions, a little flour, salt and pepper. Make about 3 layers. Pour in whole milk to almost cover. Dot with butter and bake in 300 degree oven for 4 hours. Makes the best flavor potatoes. Using new potatoes helps with the flavor, too.
I used to do it that way - but I learned that if I pour the hot white sauce over the potatoes that it would give the cooking a jump start and shorten the baking time.