Cook jacket potatoes as usual, peel and cut into slices after cooling.
Pour the potato slices into a greased casserole dish, season with salt and pepper.
Slice the camembert and spread it generously between the potatoes.
Whisk the eggs with pepper and salt and distribute evenly over the gratin. Sprinkle with the diced ham and bake in the preheated oven at 220 ° for 15-20 minutes (middle rack).