quick recipie for fish pie for not fantastic cook

[niceglasses]

Am trying to be half healthy. Anyone got uncomplicated fish pie rec? I've got salmon and cod I think, also cream and pots of course. Want the kids to eat it if poss........thanks in advance.

Boil spuds.
Steam fish.
Steam chopped or frozen carrots/peas.
Sweat onions.
Make quick cheese sauce whilst steaming.
Flake fish into casserole add cheese sauce, softened onions and veg and mix gently together.
Top with mashed pots and some saved grated cheese.
Tomatoes on top and pop in oven to brown and cook a bit more.

Thanks for replying gooseegg - gonna give it a whirl right now - just needed a bit of guidance. All the ones in the recipie books a bit complicated for me!!