Preheat your oven to 425°F.
Trim the asparagus and toss with a drizzle of olive oil, salt, and pepper. Spread on a baking sheet.
Place the asparagus in the oven and roast for about 12-15 minutes until tender and slightly crisp.
While the asparagus roasts, season the salmon fillet with salt and pepper.
Heat a non-stick skillet over medium-high heat. Sear the salmon for about 3-4 minutes per side until nicely browned and cooked to your desired doneness.
Meanwhile, steam or boil the cauliflower florets until they are tender, about 8-10 minutes.
Drain the cauliflower and transfer to a bowl. Add butter, a drizzle of olive oil, salt, and pepper, then mash until smooth and creamy.
Plate the salmon alongside the roasted asparagus and a generous serving of cauliflower mash.
Serve immediately and enjoy your balanced, flavorful meal.