Combine first 6 ingredients. Preheat alder plank* in 400° oven. Place salmon, skin side down, on plank; cover with butter mixture. Bake 10 to 15 minutes or until done.
*We recommend a reusable alder plank with a trough cut in the center to hold juices. (See page 231 for a source.) If using a flat disposable alder plank, place in a shallow baking pan to collect drippings.