01 -
Peel the potatoes and slice off the ends to create flat surfaces. Cut into thick cylinders about 1 1/2 inches tall. Pat very dry with paper towels. Season all over with salt and pepper.
02 -
Heat the oil in a 12-inch oven-safe skillet over medium-high heat until it shimmers. Lay the potatoes flat-side down in a single layer with space between each piece. Cook without moving for 5 to 6 minutes until a deep golden crust forms. Flip and sear the second side for another 5 to 6 minutes.
03 -
Reduce the heat to medium. Add the butter, thyme, and garlic. Swirl the pan constantly until the butter melts and begins to foam, about 1 minute. Cook until the kitchen smells nutty and herbal, about 30 seconds more.
04 -
Pour in the chicken stock and bring to a boil, scraping up any browned bits from the bottom of the pan with a wooden spoon. Those browned bits add deep savory flavor to the final glaze.
05 -
Transfer the skillet to a 425°F oven. Roast for 25 to 30 minutes, basting the potatoes once halfway through, until a paring knife slides through the centers with no resistance and the liquid has reduced to a glossy, saucy glaze.