with fish i like simple flavours.

Piece of fish (which ever you prefer)
Place in boat shaped foil
Cover in soy source
Add some herbs, I use origano
Pinch foil together, leaving a little hole so the fish steams, not boils
Place in oven for about 15-20mins on 200 degrees

And there u have it, yum! Very simple and bursting with flavour. Try get a firm piece of fish when you buy it I find the flavours are best that way