Potatoes Gratin - Individual servings

0 Preheat the oven at 375ᵒ. Grease a gratin dish well.
1 Add half of the potatoes slices by overlapping them and covering the bottom of  individual  gratin dish. Sprinkle generously with salt and pepper.
2 Add ¾ of the heavy cream and ¾ of the mozzarella cheese. Cover with the remaining potatoes. Sprinkle with salt and pepper. Add the heavy cream and the remaining of the mozzarella.
3 Place in the hot oven and cook for 30 to 40 minutes.