Baked fries are best right out of the oven, but you can make them a couple hours in advance. Follow the baked French fries recipe, roasting the fries until they're crisp on both sides (don’t add the herbs or parmesan). Leave the fries out at room temperature on the baking sheet (uncovered) for up to 2 hours. Before eating, slide the pan back into a 400-450˚F preheated oven and bake the fries until warmed through and crisp (about 5 minutes). Sprinkle with the parmesan and herbs, and serve.