In a small bowl, mix lemon zest, lemon juice, olive oil, Dijon mustard, garlic, salt, and pepper.
Spread the marinade over the salmon fillets evenly. Let sit for 1 hour if time allows.
Preheat oven grill (broiler) to 280°C / 525°F and position rack 20 cm from heat.
Toss asparagus and tomatoes with olive oil, salt, and pepper. Spread on a baking tray.
Place salmon on the tray, leaving space between pieces. Lightly spray with oil.
Cook the Lemon Garlic Salmon Tray Bake for 11 minutes or until salmon flakes easily.
Transfer to serving plates, sprinkle parmesan over vegetables, add lemon juice, and garnish with parsley. Serve immediately.