Let 1.5 pounds salmon filets sit at room temperature for 10–15 minutes and preheat your grill to medium-high heat, approximately 400 degrees F.
Place a large piece of heavy-duty foil on a flat surface and spray it with non-stick cooking spray.
Place half of 1 small bunch fresh dill and half of 1 sliced lemon on the bottom of the foil.
Place the 1.5 pounds salmon filets on top of the dill and lemon slices.
Drizzle 2 tablespoons melted butter over the salmon filets.
Top the salmon with the remaining lemon slices and remaining fresh dill.
Season the salmon with 2 teaspoons minced garlic, ½ teaspoon salt, and ¼ teaspoon black pepper.
Wrap the foil tightly around the salmon and seal it completely.
Place the foil packet directly on the grill grates, cover the grill, and cook for 14–18 minutes.
Carefully unwrap the foil so the top of the salmon is exposed.
Cover the grill again and cook for an additional 3–5 minutes until the top of the salmon is a darker pink color and the internal temperature reaches 145 degrees F.
Carefully remove the foil packet from the grill and serve immediately.
Notes
I used an instant read meat thermometer to make sure that the salmon was cooked to a safe internal temperature.When the salmon cooks in the foil packet, it remains a light pink color so this is why we unwrap the foil packet and allow it to cook with the salmon exposed.The salmon is best served immediately as leftover salmon dries out. You can refrigerate the leftovers in an airtight container for up to 3 days.