Creating Baked Salmon in Foil with Asparagus and Lemon Garlic Butter Sauce is straightforward if you follow these steps:

1. Preheat your oven to 400°F (200°C).
2. Prepare the Foil: Cut four large sheets of aluminum foil, approximately 12 inches long.
3. Lay out the Foil: Place each sheet of foil on a baking tray, ensuring they are ready for the ingredients.
4. Position Salmon: Place a salmon fillet in the center of each foil sheet.
5. Add Asparagus: Distribute the trimmed asparagus around the salmon, creating a colorful display.
6. Make the Lemon Garlic Butter: In a small bowl, mix melted butter, minced garlic, lemon juice, lemon zest, salt, pepper, and dried parsley until well combined.
7. Pour Sauce: Evenly drizzle the lemon garlic butter sauce over the salmon and asparagus.
8. Wrap the Foil: Fold the edges of the foil together, creating a sealed packet to keep the moisture inside.
9. Bake: Transfer the baking tray to the preheated oven and bake for 15-20 minutes, or until the salmon is cooked through and flakes easily with a fork.
10. Serve: Remove from the oven and carefully open the foil packets. Be cautious of steam. Serve with lemon slices for garnish.

These steps will guide you in creating this incredible dish with ease!