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 the asparagus roasts, steam the cauliflower florets until very soft, about 8-10 minutes.
Drain the cauliflower well and blend with minced garlic, salt, and pepper until it reaches a smooth, mash-like consistency.
Heat the remaining teaspoon of olive oil in a non-stick skillet over medium-high heat.
Season the salmon fillet with salt and pepper, then sear for 4-5 minutes per side until the skin is crisp and the fish is cooked through.
Plate the cauliflower mash first, topping it with the seared salmon and serving the roasted asparagus on the side.