4 or 5 potatoes (I used red ones)
3 Tbsp. butter
2 c. grated cheese (I did a mixture of parmesan and sharp cheddar)
1 1/2 c. milk+ 3 Tbsp. flour, mixed together
Slice your potatoes, as thinly as you can manage without cutting yourself. Get a large rectangular pan, and coat it with cooking spray. Make a layer of potatoes on the bottom, putting them on top of each other a little bit, like so:
Dot with about a tablespoon of the butter, diced into very small cubes. Sprinkle on some pepper.
Layer in some cheese to cover, then do another layer of potatoes on top. Cover again with the rest of the cheese. Then pour the milk/flour mixture over the top, and bake at 375* for about 45 minutes.