Clean and pat dry the potatoes. Do not remove the skin.
Slice into desired thickness.
Preheat the oven to 450 degrees F with the rack on the lower level.
In a large bowl toss the potatoes with the oil, salt and pepper and any other toppings you like.
Place on the baking sheet in a single layer.
Bake for 25-35 minutes tossing the fries in the middle of baking time.
Serve immediately with ketchup and any extra seasonings. Toss with parmesan or chopped fresh herbs if desired.