Preheat the oven to 450 degrees. Scrub the potatoes and cut them lengthwise into sixths or eighths, depending on thickness. You want each plank to be a good hefty wedge of a potato.
Toss the potato planks with the oil in a bowl, making sure each piece is coated. Spread the planks evenly on a lightly greased baking sheet.
Combine the seasoning ingredients in a small bowl and sprinkle half of mix over potatoes. Bake for 20 minutes, until golden on top. Turn the planks over and sprinkle with remaining seasoning. Bake another 7 to 10 minutes, until bottoms are golden brown. Serve immediately -- cold planks tend to shrivel.
Recipe courtesy of David Bowers, author, Bake it Like a Man