Wash the potatoes (amount depends a little on hunger) and cut into 1 cm thick slices. Pour into a large plastic bag, add the oil, close the bag and shake well.
Place the potatoes on a baking tray lined with baking paper, cut the garlic bulb crosswise into slices and distribute between the potato slices. Salt and pepper.
Place in the oven preheated to 200 ° and bake for 25 minutes. Then take it out and sprinkle with the grated parmesan. Bake for another 5-10 minutes until crispy.
Delicious with grilled food or with a salad as a vegetarian meal.