Preheat your oven to 400°F and line a baking sheet with parchment paper.
Peel and dice the Yukon Gold potatoes into 1-inch cubes, then place them in a pot of boiling salted water for 12-15 minutes until fork-tender.
Place broccoli florets on the baking sheet, lightly mist with water or a tiny bit of oil spray, season with salt, and roast for 15 minutes until the edges are slightly charred.
Pat the salmon fillet dry with a paper towel and season both sides with salt and pepper.
Heat a non-stick skillet over medium-high heat and sear the salmon for 3-4 minutes per side until the skin is crisp and the flesh is cooked through.
Drain the potatoes and return them to the pot, adding the minced garlic and ghee.
Mash the potatoes until smooth and creamy, adding a splash of hot water if needed for consistency.
Plate the garlic mash, top with the seared salmon, and serve alongside the roasted broccoli with a fresh squeeze of lemon juice over the fish.