Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Trim the woody ends off the asparagus and toss the spears with olive oil, half of the sea salt, and half of the black pepper.
Arrange the asparagus in a single layer on the baking sheet and roast for 10-12 minutes until tender and slightly charred.
While the vegetables roast, pat the striploin steak completely dry with paper towels and season both sides with the remaining salt and pepper.
Heat a cast-iron skillet over medium-high heat until it begins to smoke slightly.
Place the steak in the hot pan and sear for 3-4 minutes per side for a perfect medium-rare finish.
Reduce the heat to medium and add the grass-fed butter, smashed garlic clove, rosemary, and thyme to the skillet.
Tilt the pan slightly and use a spoon to continuously baste the steak with the foaming herb butter for 1 minute.
Transfer the steak to a cutting board and let it rest for at least 5 minutes to allow the juices to redistribute.
Slice the steak against the grain and serve immediately alongside the roasted asparagus spears.