Pat the sirloin steak dry with paper towels and cut into 1-inch cubes.
Season the steak bites evenly with sea salt and black pepper.
Trim the woody ends off the asparagus and cut the spears into 2-inch pieces.
Heat a large cast-iron skillet over medium-high heat and add half of the ghee.
Add the steak bites in a single layer, searing for 2 minutes per side until a golden crust forms.
Remove steak from the pan and set aside; add the remaining ghee and the asparagus to the skillet.
Sauté the asparagus for 3-4 minutes until tender-crisp and vibrant green.
Stir in the minced garlic, rosemary, and thyme, cooking for 1 minute until fragrant.
Return the steak bites to the pan, tossing everything together to coat in the herb butter before serving.