Place salmon filet (skin side down) in a baking dish (large enough that the filet can lay flat).
In a small dish, mix dressing and seasoning. Pour over salmon. Place lid or plastic wrap over salmon and allow it to marinate for 30 minutes in the fridge.
Preheat oven to 425 degrees F.
Tilt pan back and forth or spoon excess marinade over the top of the salmon and then pop in the oven to bake for 15-18 minutes or until it is cooked through and flakes (depends on thickness).