Preheat your oven to 400°F.
Place the salmon fillet on a plate and season lightly with salt and pepper. Pat the surface dry.
Coat the top of the salmon evenly with the chopped pistachios, gently pressing them so they adhere well.
Arrange the salmon on a baking sheet lined with parchment paper.
Toss the asparagus in a small bowl with olive oil, salt, and pepper, then spread them out on a separate baking tray.
Place both the salmon and asparagus in the oven. Roast the asparagus for about 10-12 minutes until tender, and bake the salmon for 12-15 minutes until just cooked through.
While the salmon and asparagus are roasting, rinse the quinoa under cold water. In a small saucepan, combine the quinoa with water (using a 1:2 ratio by volume) and a pinch of salt. Bring to a boil, then reduce heat and simmer until the water is absorbed and the quinoa is fluffy, about 12-15 minutes.
Once the quinoa is ready, stir in the lemon juice and chopped fresh herbs. Adjust seasonings as desired.
Plate the dish by placing a serving of lemon-herb quinoa alongside roasted asparagus, and top or serve with the crispy pistachio-crusted salmon.
Serve immediately and enjoy your balanced, flavorful meal.