Preheat your oven to 425°F for roasting the vegetables.
Peel (if desired) and dice the sweet potato into 1-inch pieces, then toss with a teaspoon of olive oil, salt, and pepper. Spread the cubes on a baking sheet.
Roast the sweet potato in the oven for 20-25 minutes or until tender, stirring halfway through.
Meanwhile, cut the broccoli into florets and toss lightly with salt, pepper, and a drizzle of olive oil. Add to the baking sheet for the last 10 minutes of roasting.
Season the sirloin steak on both sides with salt and pepper.
Heat a skillet over medium-high heat and add the remaining olive oil.
Add the minced garlic and fresh herbs to the skillet, allowing them to infuse the oil for about 30 seconds.
Place the steak in the skillet and sear for about 3-4 minutes per side for medium-rare, adjusting time as needed for your preferred doneness.
Remove the steak from the skillet and let it rest for 5 minutes before slicing.
Plate the sliced steak alongside the roasted sweet potatoes and broccoli, and drizzle any remaining herb-infused oil over the top.