1. 1. Preheat Your Oven and Prepare the Baking Sheet: Start by preheating your oven to 400 F (200 C). Line a large baking sheet with parchment paper or aluminum foil for easy cleanup. This prevents sticking and makes transferring the cooked meal a breeze.

2. 2. Prepare the Garlic Butter Sauce: In a small microwave-safe bowl, melt the unsalted butter. Once melted, stir in the minced garlic, fresh lemon juice, dried dill, salt, and black pepper. Mix everything until well combined. This is your flavorful sauce that will coat both the salmon and asparagus.

3. 3. Arrange Salmon and Asparagus: Place the salmon fillets on one side of the prepared baking sheet. Arrange the trimmed asparagus spears on the other side, ensuring they are in a single layer to cook evenly. Try to leave a little space between the salmon and asparagus.

4. 4. Brush with Garlic Butter: Generously brush about two-thirds of the garlic butter sauce over the salmon fillets, ensuring they are well coated. Then, drizzle or brush the remaining garlic butter sauce over the asparagus spears, tossing them gently on the sheet to ensure they are all lightly coated.

5. 5. Bake Until Cooked Through: Transfer the baking sheet to the preheated oven. Bake for 15-20 minutes, or until the salmon is cooked through and flakes easily with a fork, and the asparagus is tender-crisp. The cooking time will depend on the thickness of your salmon.

6. 6. Rest and Serve: Once cooked, remove the baking sheet from the oven. If desired, let the salmon rest for a couple of minutes before serving. Garnish with fresh chopped parsley and serve immediately with fresh lemon wedges on the side for an extra burst of flavor.