Rub a roasting pan or baking sheet with oil. Roughly dice the potatoes and add. It is best to only lay one layer so that all potatoes are in contact with the ground. Add the garlic cloves. Salt and pepper well.
Drizzle with oil so that as many potatoes as possible get something off. Pluck the needles from the rosemary and add. Add 1-2 twigs as a whole. Place the sage leaves between the potatoes.
Bake the whole thing in the hot oven for about 30-40 minutes at 200 degrees, until all the potatoes are crispy all around and have a brown color.
Goes well with grilled food or just with salad. Accompanied by a glass of red wine from Tuscany or Piedmont.