Recipe Instructions:
1 1/2 pounds thick salmon fillet, or other fish like striped bass or cod (1 large fillet or four 6-ounce fillets)
1 teaspoon extra-virgin olive oil
2 pinches kosher salt
Freshly ground black pepper, to taste
1 to 2 large dried shiitake mushrooms
Directions
Heat the oven to 275°F. Place the salmon fillet(s) on a sheet pan. Rub the salmon all over with the oil. Sprinkle lightly with salt and pepper.
Use a Microplane to finely grate the dried shiitake generously onto both sides of the salmon—it should look like a thick, fluffy blanket all over the fish. Arrange the fillet(s) on the pan skin side-down, with an inch or two between each fillet.
Roast until a fork inserted in the thickest part of the salmon meets no resistance, the flesh separates easily from the skin, and is just beginning to flake when you poke into it, 10 to 35 minutes. An instant-read thermometer should read 120°F. (Don't worry if the top of the fish has a slightly transparent look; this is the result of the low roasting temperature.) Remove the fish from the oven.
Optional, but recommended: Switch the oven to broil on high. With a spatula, slide the salmon off the skin and transfer the salmon to a plate. Place the pan with the skin on a rack about 5 inches under the heating element and broil until the skin blisters and turns golden brown in spots, 1 to 2 minutes, depending on your broiler (watch carefully as it can burn quickly).
Serve warm, room temperature, or cold, tearing or crumbling the crispy salmon skin over the top.
