Instructions

  1. Preheat oven to 350°F.
  2. Layer sliced potatoes in a 9x13-inch glass baking dish and season with salt and white pepper.
  3. Combine cream, mustard, garlic,** parmesan cheese and butter in a heavy saucepan and heat just to the boiling point.
  4. Pour over potatoes. **Add some of the reserved cheese, if using).