In a medium saucepan, heat the heavy cream and pesto over medium heat until warm, stirring occasionally.
Layer half of the sliced potatoes in a baking dish. Pour half of the pesto cream mixture over the potatoes and sprinkle with half of the Parmesan cheese. Season with salt and pepper.
Repeat the layers with the remaining potatoes, pesto cream mixture, and Parmesan cheese.
Cover the baking dish with aluminum foil and bake for 30 minutes. Then uncover and bake for an additional 30 minutes or until the potatoes are tender and the top is golden brown.
Let cool slightly before serving. Enjoy your Pesto Scalloped Potatoes!