6 tablespoons extra-virgin olive oil or melted butter
Salt and freshly ground black pepper to taste
1 ½ pounds cod or other fillets, about 1-inch thick (skinned), in 2 or more pieces
PREPARATION
This dish has a tendency to stick to the bottom of the pan. *do not slice the potatoes too thinly and you can add baking paper if your pan is not non-stick.
Heat oven to 400 degrees. Peel potatoes, and cut them into slices about 1/8-inch thick (a mandoline comes in handy here). Toss the potatoes in an 8-by-12-inch or similar size baking pan with 4 tablespoons of the oil or butter. Season the potatoes liberally, spread them evenly and place the pan in the oven.
Cook for about 40 minutes, checking once or twice, until the potatoes are tender when pierced with a thin-bladed knife and have begun to brown on top. Remove the potatoes from the oven. Turn on the broiler, and adjust the rack so that it is 4 to 6 inches from the heat source.
Top the potatoes with the fish, drizzle with the remaining oil or butter and sprinkle with some more salt and pepper. Broil until the fish is done, 6 to 10 minutes, depending on its thickness (a thin-bladed knife will pass through it easily). If at any point the top of the potatoes begins to burn, move the pan a couple of inches farther away from the heat source.
