Step 1

Preheat the oven to 400 degrees F.

Step 2

Rinse and dry the potatoes. Trim off any bad parts (do not peel). Cut the potatoes in half lengthwise.

Step 3

Transfer the potatoes to a large bowl. Add the oil, garlic, ½ teaspoon salt, thyme, and pepper. With your fingers (easiest) or a large spoon, toss to combine.

Step 4

Transfer the potatoes to a large rimmed baking sheet or roasting pan. For best results, flip the potatoes so the cut sides are flat against the pan. Make sure the pieces do not touch.

Step 5

Bake until the potatoes are browned and crisp and tender enough to easily pierce with a fork, 30 to 40 minutes depending upon the size of the potatoes. Flip the potatoes twice during cooking, spreading them back into an even layer each time.

Step 6

Remove the potatoes from the oven. Sprinkle with the parsley, Parmesan (if using), and remaining 1/4 teaspoon kosher salt. Stir to combine. Serve hot.