I don't cook fish often and my recipie is definitely not something to wow the crowd, but it's serviceable.

I make a marinade of soy sauce with some sugar (brown if you have it, but white is fine) and a little bit of honey, to taste.
Add a little dill, and some garlic (powdered or freshly chopped).

I let the piece of fish marinate covered in the fridge for maybe an hour, turning it a couple of times.

Then, put it in the oven at 350 for maybe 20 minutes or until it's cooked.

Accompany with a green salad and a little bit of mayonnaise.

Something sweet and salty that's not too much work. :)