Scalloped Potatoes

Sources? Just google 'scalloped potatoes' ... I read a bunch of recipes online and then came up with this one.

8 cups extra-thinly sliced potatoes
1/4 c onion
5 tbsp butter
2 c milk
1/2 c flour
dash nutmeg
salt and pepper
1 c grated cheese

Chop onion and sauté in butter until onion is softened and translucent. Whisk flour into milk and add to onion and butter. Reduce heat to simmer. Whisk in spices and cook until thickened. Add cheese and cook until melted, stirring often. Turn off heat, add potatoes, and toss until potatoes are coated with sauce. Pour mixture into a greased 9x13 pan, pushing top layer of potatoes down into sauce. Bake at 370 °F for 30-40 minutes, until browned on top.