Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Trim the woody ends off the asparagus and place them on the baking sheet, seasoning with a pinch of sea salt and black pepper.
Roast the asparagus for 10-12 minutes until tender-crisp.
While asparagus roasts, steam the cauliflower florets and garlic clove until very soft, about 8-10 minutes.
Drain the cauliflower thoroughly and blend or mash with a splash of lemon juice until smooth and creamy.
Heat a non-stick skillet over medium-high heat with the olive oil.
Season the salmon with salt and pepper, then sear for 4-5 minutes on the skin side until crispy.
Flip the salmon and cook for another 2-3 minutes until the center is just opaque.
Plate the cauliflower mash, top with the seared salmon, and serve the roasted asparagus on the side with a final squeeze of lemon.