Preheat your oven to 400ºF (205ºC) and ensure the oven rack is positioned in the center.
Lightly grease a baking dish or line it with parchment paper for easy cleanup.
Arrange the 16 oz (454g) of salmon fillets inside the prepared baking dish, ensuring they are spaced out and not overcrowding the pan.
Brush the 2 tbsp (30ml) of melted butter evenly over the tops of the salmon fillets to act as a binder for the spices.
In a small bowl, mix the 1 tsp (5 ml) dried dill, 1 tsp (5 ml) onion powder, 0. 5 tsp (25 ml) pepper, and salt, then sprinkle this mixture evenly over the buttered fillets.
Bake in the preheated oven for 20 minutes, or until the fish is opaque and flakes easily with a fork (aim for an internal temperature of 145°F / 63°C).
Remove the Easy Salmon Steaks with Dill from the oven and transfer them to a serving platter immediately to serve warm.