Preheat your oven to 400°F. Halve the baby potatoes and place them on a parchment-lined baking sheet, seasoning with a pinch of sea salt and pepper.
Roast the potatoes for 20 minutes. After 20 minutes, add the asparagus spears to the same tray and roast for an additional 10 minutes until the vegetables are tender.
While the vegetables roast, pat the sirloin steak completely dry with paper towels to ensure a superior sear.
Season both sides of the steak generously with the measured sea salt and black pepper.
Heat the avocado oil in a cast-iron skillet over medium-high heat until it begins to shimmer.
Place the steak in the hot skillet and sear undisturbed for 3-4 minutes to develop a deep brown crust.
Flip the steak. Immediately add the ghee, smashed garlic clove, rosemary, and thyme to the skillet.
Tilt the pan slightly and use a large spoon to continuously baste the steak with the melting herb ghee for the final 2-3 minutes of cooking.
Remove the steak from the pan and let it rest on a cutting board for 5 minutes to allow the juices to redistribute.
Slice the steak against the grain and serve alongside the roasted potatoes and asparagus, drizzling any remaining herb ghee from the pan over the top.