I love fish grilled on cedar planks ... we do this a lot when the weather is good (it is now!). I also have the theory that covering the fish with something juicy like tomato slices helps keep it nice and moist while still allowing the smoky flavor in. I happened to find some super sweet Campari tomatoes at the store yesterday. For this fish I used an actual store-bought plank rather than a fence picket, because I got one for free with a coupon. —aargersi
Soak the plank for an hour or two in water. Or, it occurs to me that soaking it in white wine might add some flavor, though I haven't tried it - if you do let me know how it works! Heat the grill to HOT.
Lay your salmon filet on the plank, and coat with a small amount of olive oil. I use a Misto for this - it works great. But I am gadgety. Now squeeze juice from half the lemon on top, then sprinkle a couple pinches of salt and a couple grinds of pepper. Sprinkle chopped fresh parsley, then cover the fish first with thin slices of shallot then thin slices of tomato. The whole fish should be covered. Cut the other half of the lemon in quarters and put them on the plank - they are going along for the ride. Sprinkle another pinch of salt and grind a bit more pepper over everything.
Get a spritzer and set it to stun. I have water in mine but back to that wine thought - maybe some white wine would be good in there? Put the fish on the grill and let it cook through, keeping on eye that the plank does not burst into flame. If it tries to, spritz the flame without blasting your fish off the plank. (would wine catch fire? I don't think so ...)
When the fish is cooked this is what I do - because fish skin grosses me out and it will be kind of stuck to the plank anyhow, so I use a big flat fish spatula to shimmy the flesh off of the plank and onto a serving plate. Squeeze the juice of those smoked lemons over the fish and enjoy!
I work in databases by day, but creativity is my outlet. Food - imagining it, making it, sharing it. And art, I come from a family of artists and have been collaging in my garage studio. You can see my work on Etsy in my shop AbbiesGarage https://www.etsy.com/shop/AbbiesGarage?ref=search_shop_redirect