Preheat and prep: Preheat your oven to 425°F (220°C). Line a rimmed baking sheet with parchment or aluminum foil for easy cleanup and even heat. Preheating to a high temperature helps the salmon and vegetables caramelize quickly — you get color and flavor without long cooking that dries the fish.

Rinse and toast the quinoa (why: rinsing removes bitter saponins; toasting develops a deeper, nuttier flavor): Place the 1.5 cups dry quinoa in a fine mesh sieve and rinse under cold running water until the water runs clear, rubbing the grains with your fingers. Drain well. Heat a medium saucepan over medium heat, add 1 teaspoon olive oil and the drained quinoa. Toast, stirring, for 2–3 minutes until aromatic and starting to look dry — this step blooms the nutty oils in the grain and prevents a bland final texture.

Cook the quinoa (why: the 1:2 ratio creates fluffy cooked quinoa): Add 3 cups water or low-sodium broth and a pinch of salt to the saucepan. Bring to a vigorous simmer, then reduce heat to low, cover tightly, and cook for 12–15 minutes until all the liquid is absorbed. Turn off the heat and let it sit, covered, for 10 minutes — resting allows the steam to finish the cooking and gives light, separated grains. Fluff with a fork and keep covered.

Prepare the vegetables (why: staggered roasting ensures even caramelization): Toss the sliced carrots in a bowl with 1 tablespoon olive oil, 1/2 teaspoon kosher salt, and a few grinds of black pepper. Spread them on one side of the prepared baking sheet in a single layer. Roast carrots first for 8 minutes (they're denser and need a head start).

Add broccoli to roast with carrots (why: matching cut size and timing produces even browning): After the carrots have roasted 8 minutes, toss the broccoli florets with the remaining 1 tablespoon olive oil, 1/2 teaspoon kosher salt, and pepper. Add broccoli to the baking sheet and toss with the carrots so pieces are spaced out. Return to the oven and roast for 12–15 more minutes, turning once halfway through, until broccoli edges are charred and carrots are tender and caramelized. High dry heat creates Maillard browning which adds savory depth.

Season the salmon (why: patting dry and a light oil coat helps browning and prevents sticking): While the vegetables roast, pat the salmon fillets dry with paper towel — removing surface moisture encourages a golden exterior. Place fillets skin-side down on a second lightly oiled baking sheet or in a shallow roasting pan. Drizzle each fillet with a little olive oil (about 1/2 tsp per fillet), rub a pinch of salt and pepper over the surface, zest the lemon over the tops for bright citrus oil, and sprinkle the minced garlic evenly. Reserve the lemon juice and chopped herbs for finishing.

Bake the salmon (why: high, quick baking cooks through without drying): When the vegetables have about 10–12 minutes left, slide the salmon into the oven on the middle rack (425°F / 220°C). Bake for 10–12 minutes for 5–6 oz fillets: the exact time depends on thickness — check doneness at 10 minutes. You want the center to go from translucent to just opaque and flaky when tested with a fork. Overcooking is the most common mistake; remove the fish when it still flakes easily and has a moist center. If your fillets are thicker than 1 inch, add 1–2 minutes.

Make the lemon-garlic herb dressing (why: a finishing vinaigrette brightens flavors and ties the components together): While the salmon rests, whisk the reserved lemon juice, chopped herbs, a tablespoon of olive oil from the roasting pan if needed, a small pinch of salt, and a few grinds of pepper in a small bowl. Taste and adjust — this glossy vinaigrette adds acidity and freshness that lifts the whole dish.

Rest the salmon and finish quinoa (why: resting lets juices redistribute; finishing adds shine and flavor): When salmon is done, remove from oven and let rest 3–4 minutes — this keeps the fillets tender. Fluff the quinoa again and, if desired, stir in 1–2 teaspoons of olive oil and a pinch of salt to round the flavor and separate the grains.

Plate and serve (why: layering contrasts textures and balances flavors): Spoon a generous portion of quinoa onto each plate. Arrange roasted broccoli and carrots alongside or on top of the quinoa. Place a salmon fillet on the quinoa, spoon the lemon-garlic herb dressing over the salmon and vegetables, and finish with an extra sprinkle of fresh herbs and a twist of black pepper. Serve immediately so the salmon stays warm and the roasted vegetables keep their crisp edges.