Steam the cauliflower florets in a basket over boiling water until very tender, about 10 to 12 minutes.
While the cauliflower steams, pat the salmon fillet dry and season both sides with salt and black pepper.
Heat half of the ghee in a non-stick skillet over medium-high heat until shimmering.
Place the salmon in the pan skin-side down and sear for 4-5 minutes until the skin is golden and crispy.
Flip the salmon and cook for an additional 3 minutes or until cooked to your desired level of doneness, then remove from the pan.
In the same skillet, add the remaining ghee, minced garlic, and green beans, sautéing for 5 minutes until tender-crisp.
Drain the steamed cauliflower thoroughly and transfer to a blender or use an immersion blender to process with a pinch of salt until completely smooth.
Plate the creamy cauliflower mash, top with the seared salmon, and serve the garlic green beans alongside.