Preheat the oven at 200 degrees Celsius.
Cook the potatoes, and then slice them in thin slices.
Cut the onion and bacon in thin slices.
Put the potatoes, onion and bacon in layers in an oven form.
Cut the camembert cheese in half so you have 2 round circles. Put the cheese on top of the dish.
Place the camiflette in the middle of the oven for 30 minutes. Take it out and serve it hot together with a fresh green salad.