01 - Preheat oven to 400°F. Line a large baking sheet with parchment paper or foil for easy cleanup.
02 - In a small bowl, whisk together melted butter, lemon juice, lemon zest, garlic, parsley, dill, salt, and pepper until well combined.
03 - Place salmon fillets on one half of the baking sheet. Pour the lemon garlic butter mixture evenly over the salmon, ensuring each fillet is coated.
04 - Spread asparagus on the other half of the baking sheet in an even layer. Drizzle with olive oil, sprinkle with salt and pepper, and toss to coat evenly.
05 - Bake for 15-18 minutes, or until salmon flakes easily with a fork and asparagus is tender-crisp.
06 - Remove from oven. Garnish salmon and asparagus with fresh lemon slices and additional chopped parsley. Serve immediately.