A mouth-watering BBQ salmon cooked on a cedar plank with a Soya ginger garlic Glaze. First thing you need is the cedar plank. You can buy cedar planks specially cut for this purpose, but i find it so much cheaper to just get a UNTREATED ceder fence board 12 inches wide by 4 feet long, 1 inch thickness. 1 board is about $2 and i can cut it and have wood left for future BBQ's. I've heard some people say they have used wood from the lumberyard and it didn't turn out good. Perhaps they were using treated wood. I always clean the wood before use, by soaking it in boiling water for a few hours. Just pour boiling water over it and let it soak for 3 or four hours, over night if possible. Cut the wood to match the size of your salmon fillet and to fit your BBQ grill. Sand off any protruding splinters, you don"t want to eat a wood splinter.