I think it was LisaE who had a funny story about au gratin potatoes....but I wouldn't dare steal her thunder tho. I'm sure if you emailed her, she'd tell you all about it.
(Or if you want to check this out -
http://www15.brinkster.com/wishstar/oct02/recipe.htm you can read her story.)
My version of au gratin potatoes involves -
Slicing potatoes (fairly thin)
Layering potatoes in a cassarole dish with knobs of butter
On the top layer, sprinkle about 1/4 cup of flour over the top and some more butter
Pour in milk until it is about 1/4 inch from the top of the dish
Cover with foil, bake for about 1 hour in a 200C oven, Uncover and bake until golden brown (about 10 minutes more)
We sometimes add bits of ham or bacon into this and it is just lovely too.
Yum!