Preheat your oven to 425°F (220°C) for the roasted potatoes.
Wash the baby potatoes and, if desired, cut them in halves. In a bowl, toss the potatoes with olive oil, a pinch of salt, pepper, and half the minced garlic. Spread them out on a baking sheet.
Roast the potatoes in the preheated oven for about 20-25 minutes or until crispy and tender, stirring halfway through.
While the potatoes are roasting, pat the 6 oz sirloin steak dry with paper towels. Season both sides generously with salt, pepper, and the remaining minced garlic.
Heat a skillet (preferably cast iron) over medium-high heat. Once hot, add the steak and sear for about 3-4 minutes per side for medium-rare, or adjust the time to your desired doneness.
During the last minute of searing, add the fresh mixed herbs to the steak, allowing the aroma to infuse the meat.
Remove the steak from the skillet and let it rest for a few minutes to retain its juices.
Plate the sliced steak alongside the crispy roasted potatoes and serve immediately.