Lol... They're just classic dishes, if you like a nice sauce with some flaky fish :)
If you're up for doing some cooking yourself, aside from Mornay, etc, a great way to cook cod or salmon is in the oven, wrapped in tinfoil, as it keeps the fish lovely and moist.
So before putting it in the oven, blob a knob of butter on top of the fish, along with some lemon juice, a dash of white wine and some fresh herbs (dill is ideal), then wrap up the fish, and everything else, into a little parcel with the tinfoil.
When it's cooked, and you unwrap the parcel, the fish will be beautifully succulent, and the butter, wine and herbs will have infused together into a lovely, tasty light sauce. Simply carefully lift the fish off of the tinfoil and place it onto a plate, then drizzle the sauce inside the tinfoil over the top of the fish, and serve it with the potatoes and veg, as mentioned above.
For extra finesse, place a sprig of dill and a slice of lemon on top of the fish before serving. And if having it with boiled new potatoes, melt some butter on top and add some sprigs of fresh parsley. That makes a lovely, tasty and healthy meal!
Marco.