Add potatoes to a heavy bottom skillet. Pour oil over the top. Oil should just cover the potatoes. Cook over medium heat until oil bubbles. Allow to cook for 5 minutes or until the outside of the fries become firm. Stir the potatoes. Continue cooking for 15 – 20 minutes or until fries become golden brown. Stir occasionally while being careful to gently scrape any that stick to the bottom of the pan. Once fries have started to turn golden brown, add sage and rosemary.