If you tend to stay away from fish because you are afraid of overcooking it (or just don't much like the odors it creates in your kitchen), here's a great recipe to change your mindset. The fish is arranged in a baking dish with tomato, mushrooms, and garlic on top, simply seasoned, and drizzled with a bit of olive oil before going into a hot oven (which traps the smells) and baked until opaque throughout -- the surest sign that fish is properly cooked through.