Add half the oil to the griddle and then the fries, in a single layer.
Let the fries cook until browned on the bottom and then flip.
Drizzle some additional oil onto the griddle and continue to cook and flip until the fries are golden brown.
During the last minute of cooking, add the butter to the griddle along with the chopped garlic. Let it sauté for about 60 seconds and then stir and toss the fries into the garlic butter until they are evenly coated.
Sprinkle the grated parmesan and shredded parmesan over the top.