How hard was it for your questions and answers not to look like this:
How much wine? I don't know..some! What temperature is the oven? Cranked! How much--Look, I don't know. I don't measure, I don't weigh, I just know what has to happen and I make it happen. The fine details you have to figure out for yourself. If you can't, well, I guess you'll have to come in and order it off the menu.
Also, a box grater works fine for the potatoes. You won't get them as long, thin and "nest-like", but you can still fry em up like a potato pancake. Just try to keep the pancake thin so you can still wrap the fish.
I have also box grated potatoes a little ahead of time, letting them get kinda starchy, and then packing them on top of a piece of salmon. Sear the taters and salmon, potato side down, flipping gently, and then finishing in the oven.