What's your favorite recipe for scalloped potatoes?

I’ve never yet made them from scratch, and I’m about ready to try. It’s a bit chilly and rainy—good weather for that sort of thing.

I used to love my mother’s scalloped potatoes, but I don’t have her recipe. She seldom made them because she said they were so fussy.

I know there have to be potatoes, onions, and milk. Cheese might not be essential. They have to be baked in the oven.

What’s your recipe, and how long do the preparations take?