Steam the cauliflower florets until very tender, approximately 10-12 minutes.
Transfer steamed cauliflower to a blender or food processor with half of the ghee and a pinch of salt, blending until smooth and creamy.
Blanch the green beans in boiling water for 3 minutes, then immediately drain and set aside.
Heat the remaining ghee in a large skillet over medium-high heat.
Season the salmon fillet with salt and pepper, then place in the skillet skin-side down.
Sear the salmon for 4-5 minutes until the skin is crispy, then flip and cook for an additional 2-3 minutes until cooked through.
Remove the salmon from the pan and let it rest.
In the same skillet, add the minced garlic and blanched green beans, sautéing for 2 minutes until fragrant and tender.
Plate the cauliflower mash, top with the seared salmon and green beans, and finish with a fresh squeeze of lemon juice.