Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Wash and dice the Yukon gold potato into 1/2-inch cubes, then toss with avocado oil and a pinch of sea salt.
Spread the potatoes on the baking sheet and roast for 20-25 minutes, flipping halfway through, until golden and crispy.
While potatoes roast, season the steak generously on both sides with sea salt and black pepper.
Heat a cast-iron skillet over medium-high heat until very hot, then sear the steak for 3-4 minutes per side for medium-rare.
Reduce the heat to medium-low and add the ghee, smashed garlic cloves, rosemary, and thyme to the skillet.
Tilt the pan and use a spoon to continuously baste the steak with the melted herb ghee for 1-2 minutes.
Remove the steak from the pan and let it rest on a cutting board for at least 5 minutes.
In the same skillet with the remaining herb ghee, sauté the green beans for 4-5 minutes until tender-crisp and vibrant.
Slice the steak against the grain and serve alongside the crispy potatoes and sautéed green beans.