Preheat your oven to 425°F (220°C) for the potatoes.
Halve or quarter the baby potatoes depending on size, toss them with a drizzle of olive oil, salt, and pepper, and spread on a baking sheet.
Roast the potatoes in the preheated oven for about 20-25 minutes until crispy on the outside and tender on the inside.
While the potatoes are roasting, pat the steak dry and season generously with salt and pepper.
Heat a heavy skillet over medium-high heat until very hot. Sear the steak for about 3-4 minutes on each side for medium-rare, adjusting time as needed.
In the last minute of cooking, add the teaspoon of unsalted butter, a crushed garlic clove, and fresh thyme to the pan. Tilt the pan and spoon the herb-garlic butter over the steak.
Remove the steak and let it rest for a couple of minutes before slicing.
Plate the seared steak alongside the roasted baby potatoes, drizzling any remaining herb butter over the top. Enjoy your balanced, flavorful meal!