Preheat and line: Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper or lightly grease it with butter.
Arrange the salmon: Place the salmon fillet skin-side down on the prepared pan, then season evenly with salt and pepper.
Make the butter sauce: In a small bowl, whisk together the melted butter, lemon juice, honey, and minced garlic until well combined, about 1 minute of stirring.
Assemble on the pan: Pour the butter sauce evenly over the salmon, then arrange the lemon slices on top and around the fillet.
Bake until done: Bake for 12 to 15 minutes, until the salmon is cooked through and flakes easily with a fork at the thickest part.
Remove from oven: Carefully take the sheet pan out of the oven and let it rest for 1 minute.
Transfer to plate: Slide a spatula under the salmon to separate it from the skin if desired, then transfer to a serving plate.
Drizzle sauce: Pour any pan juices and caramelized butter from the sheet pan over the salmon.
Garnish: Top with fresh parsley and extra lemon slices for a bright, finished presentation.