Preheat your oven to 400°F (200°C) and line a sheet pan with parchment paper.
Wash and cube the red potatoes into small, even pieces; trim the woody ends off the asparagus.
In a small bowl, whisk together the olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper.
Place the sirloin steak, potatoes, and asparagus on the prepared baking sheet.
Drizzle the garlic-herb oil over the beef and vegetables, tossing the produce to coat evenly and rubbing the mixture into the steak.
Roast in the oven for 15-20 minutes, or until the beef reaches your desired level of doneness and the potatoes are golden and tender.
Remove from the oven and let the beef rest for 5 minutes before slicing it against the grain.