Preheat oven to 475 degrees.
Place butter in small roasting dish, sprinkle dill evenly across. Place in oven and heat until butter has melted and dill is sizzling, about 4 - 5 minutes.
Remove pan from oven and place fillets skin-side up. Return to oven and roast 4 minutes.
Remove from oven and pull skin from salmon (if the skin doesn't pull away roast another 1 - 2 minutes).
Return to oven and cook to desired doneness, about 3 - 4 minutes longer.
Plate salmon and spoon butter in pan over salmon. Sprinkle with parsley and serve warm with lemon zest or lemon wedges for spritzing.
Recipe source: adapted from NYT