Bring the steaks to room temperature for 20 minutes and season all sides generously with the sea salt and black pepper.
Boil a large pot of salted water and cook the brown rice pasta according to package directions until al dente, then drain and set aside.
Heat the avocado oil in a heavy cast-iron skillet over medium-high heat until it begins to shimmer and reach its smoke point.
Place the steaks in the hot skillet and sear for 3-4 minutes without moving them, until a deep golden-brown crust forms on the bottom.
Flip the steaks and immediately add the ghee, smashed garlic cloves, and the rosemary sprigs to the pan.
Tilt the pan slightly and use a large spoon to continuously baste the steaks with the melting garlic-herb butter for another 3-4 minutes until desired doneness is reached.
Remove the steaks from the pan and let them rest on a cutting board for 8-10 minutes to allow the juices to redistribute.
While the steaks rest, add the asparagus spears to the same skillet and sauté in the residual herb butter for 3-5 minutes until bright green and tender.
Toss the cooked pasta with the remaining herb butter from the pan and the fresh lemon juice to brighten the flavors.
Slice the steak against the grain and serve immediately alongside the pasta and sautéed asparagus for a complete, nutrient-dense meal.