Step 1

Heat oven to 425 degrees. Cut potatoes lengthwise into thick slices, then into 1/2-inch-by-1/2-inch-thick strips. Place in a bowl of cold water until ready to use. Drain and dry well on paper towels.

Step 2

Toss potatoes with oil and spread out on a dark roasting pan or baking sheet. Scatter thyme over potatoes. Bake for 35 to 40 minutes, turning occasionally, until potatoes are brown and crisp on all sides.

Step 3

Remove from oven, discard thyme stems (the leaves will have fallen off), sprinkle with salt and pepper, and serve immediately.