Preheat oven to 400 degrees, and place rack in the middle of the oven. In a medium bowl, combine the potatoes, olive oil, and thyme. Season with salt and pepper, and toss until well coated.
Generously brush a large rimmed baking sheet with olive oil, and overlap the potato slices just slightly. Bake until potatoes are golden brown and crisp in places, about 30 minutes.