Use small bits of butter for dotting.
Heat oven to 350°.
In 1 1/2-quart baking dish arrange in two layers
3 to 4 cups peeled, thinly sliced raw potatoes
1 tablespoon minced onion
Sprinkle each layer with salt and dot with
2 to 4 tablespoons butter
Pour over all
1 1/4 cups hot milk
Bake uncovered about 1 1/4 hours.