This works with any "white" fish (not so much with salmon, tuna etc... or maybe its just that I don't like those

).
Anyhow, place the fillets in a baking dish (spray the dish with a little non-stick spray first), and place a small pat of butter on top of each fillet. Sprinkle each fillet liberally with a citrus juice... I usually use lemon, but you can use any citrus; lime, orange, even grapefruit. Chop some fresh herbs - try to use herbs that match your citrus - for lemon, I usually use fresh parsley and fresh lemon thyme, and sprinkle those on top. Finally sprinkle the fish with a no-salt or a low-salt seasoning blend. Bake at 350° until the fish flakes easily and is opaque. When it is done, place the fish on the plates, and stir up the pan juices well, then spoon a little of the pan juices (butter, lemon, herbs, etc) over the top of the fillet.
You can also give this an Italian twist. Drain a can of diced tomatoes, reserving the juice. Place the fish in the pan, put the butter on top, and add the tomato juice instead of the citrus juice. For your herbs add chopped basil, garlic chives, chopped garlic, or anything else italian-y. Finally, add some of the the drained diced tomatoes on top, and sprinkle with some fresh grated parmsan cheese. While the fish cooks, boil up some pasta, toss the hot pasta with the rest of the tomatoes and chopped herbs and anything else you have around (capers, olives, artichoke hearts, etc?) and when the fish is done, serve the fish on top of the pasta with the pan juices poured over the top.
