Preheat your oven to 400°F.
Peel and chop the sweet potato into cubes. Boil in lightly salted water until tender, about 15 minutes.
While the sweet potato cooks, trim and halve the Brussels sprouts. Toss them with olive oil, salt, pepper, and garlic powder, then spread them on a baking sheet.
Roast the Brussels sprouts in the preheated oven for 20 minutes or until they are caramelized and tender.
Season the salmon fillet with salt, pepper, and a dash of garlic powder.
Heat a non-stick skillet over medium-high heat. Once hot, place the salmon skin-side down and sear for about 4 minutes. Flip the salmon and cook for another 3-4 minutes until it reaches your desired doneness.
Drain the sweet potatoes and mash them until smooth. Stir in your tablespoon of lemon juice and adjust seasoning with salt and pepper to taste.
Plate the mashed sweet potatoes as a base, top with the pan-seared salmon, and add the roasted Brussels sprouts on the side.
Finish with an extra squeeze of lemon if desired. Serve immediately and enjoy!