Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Slice the lean sirloin steak into 1-inch cubes and place them in a large mixing bowl.
Cut the broccoli into bite-sized florets, slice the bell peppers into thin strips, and coin the carrots into rounds.
Finely mince the garlic cloves and add them to the bowl with the steak and vegetables.
Drizzle the extra virgin olive oil over the ingredients, then sprinkle with dried oregano, dried thyme, sea salt, and black pepper.
Toss everything thoroughly until the beef and vegetables are evenly coated in the oil and aromatic seasonings.
Spread the mixture in a single layer on the prepared baking sheet, ensuring there is enough space between pieces for even roasting.
Roast in the center of the oven for 15-18 minutes, or until the steak reaches your desired level of doneness and the vegetables are tender-crisp.
Remove from the oven and let the beef rest for 2 minutes before serving to allow the juices to redistribute.