Butter, Shoyu, Salt & pepper to taste

sliced onions

sliced tomatoes

sliced zucchini and any other veggies you like

Get a whole, cleaned fish. Place enough aluminum foil in a baking dish to accomodate the fish. Place fish in dish. Place pats of butter along the top of the fish, maybe 1/2-1 inch apart (depending on how much you like butter). Throw veggies over the fish. Pour some shoyu over everything, maybe enough to make a thin layer at the bottom.

Close foil; puncture to allow steam to escape.

Bake at 400° for 30 - 45 minutes.