Preheat oven to 375ºF.
Whisk together cooking cream, milk, and pepper until blended.
Spray casserole dish with oil
Layer half each of the potatoes, onions, cooking cream mixture and Parmesan in shallow 2-L Repeat layers and cover
Bake fore 45 minutes covered and then remove lid and bake for an additional 30 minutes or until potatoes are tender and the top is browned
Enjoy