Fish in parsley sauce- probably stupid question from ex-vegetarian!

[FaintlyMacabre]

Am about to cook some haddock in parsley sauce but, how do I cook the fish? Poach it in milk as for fish pie? Bake it in the oven? Fry it?

They'll probably all taste nice, but which is the usual method?

TIA

As it's going to be in sauce I would probably just poach.

Lovely, thanks!

I have the world's biggest bunch of parsley so I see a lot of parsley related dishes in our future- I'll probably be back for more ideas!