Cook potatoes in boiling water to cover 25 to 30 minutes. Let cool slightly; peel and slice.
Layer half of potatoes, half of onion, and half of cheese in a lightly greased 13- x 9-inch baking dish. Sprinkle with half of salt and pepper. Repeat layers. Drizzle with cream.
Bake potato mixture at 350° for 1 hour or until golden.