Peel and chop parsnips, then boil in salted water for 15 minutes until completely tender.
Season the beef tenderloin generously on all sides with sea salt and black pepper.
Heat avocado oil in a cast-iron skillet over high heat until it begins to shimmer.
Sear the steak for 3 to 4 minutes per side to develop a deep, caramelized crust.
Lower the heat to medium and add one tablespoon of ghee, smashed garlic, rosemary, and thyme to the pan.
Baste the steak continuously with the foaming herb butter for 2 minutes, then remove it to a plate to rest.
Sauté the minced shallots in the same skillet until translucent, then deglaze with red wine while scraping the pan.
Reduce the wine by half, pour in the bone broth, and simmer until the liquid thickens into a glossy glaze.
Drain the parsnips and blend them with the remaining tablespoon of ghee until the texture is smooth and velvety.
Steam the asparagus spears for 3 to 5 minutes until they are bright green and tender-crisp.
Spoon the parsnip puree onto a plate, top with the rested steak, and drizzle the red wine reduction over the top.
Serve immediately alongside the steamed asparagus for a complete gourmet meal.