Preheat the oven to 400°F and line a baking sheet with parchment paper.
Place the asparagus on the baking sheet, drizzle with olive oil, season with salt and pepper, and toss to coat evenly.
Trim the tough ends off the asparagus and spread them out in a single layer.
In a small bowl, mix the lemon juice, minced garlic, a pinch of salt, and pepper.
Place the salmon fillet on another piece of parchment or in a baking dish. Brush the lemon garlic mixture over the salmon, ensuring it's well coated.
Place both the salmon and asparagus in the oven. Roast the asparagus for about 12-15 minutes until tender. Bake the salmon for 12-15 minutes or until it flakes easily with a fork.
While roasting, warm the cooked quinoa in a saucepan or microwave. Fluff it with a fork.
Assemble the bowl by layering the quinoa, topped with the roasted asparagus and the lemon herb salmon.
Finish with an extra drizzle of olive oil or a squeeze of fresh lemon if desired. Serve warm and enjoy.