Preheat your oven to 400°F and line a baking sheet with parchment paper.
Toss the asparagus spears with one teaspoon of olive oil, salt, and pepper, then spread them on the baking sheet.
Roast the asparagus for 12-15 minutes until tender and slightly charred.
While asparagus roasts, steam the cauliflower florets until very soft, about 8-10 minutes.
Place the steamed cauliflower in a blender or food processor with the minced garlic and a splash of water or unsweetened nut milk, blending until smooth and creamy.
Season the salmon fillet with salt and pepper.
Heat the remaining teaspoon of olive oil in a non-stick skillet over medium-high heat.
Sear the salmon skin-side down for 4-5 minutes, then flip and cook for another 2-3 minutes until opaque and flaky.
Plate the cauliflower mash, top with the seared salmon, and serve the roasted asparagus on the side.
Finish the dish with a fresh squeeze of lemon juice over the salmon.