Eagle,
I enjoy cooking fish in a toaster oven I have. It is a bit energy ineficient but it uses less than warming up the big oven. What I like to do is place the halibut (or other fish such as salmon or tilapia) in a shallow pan that fits inside the toaster oven. I liberaly sprinkle the fish with lemon juice first then salt, pepper, and garlic powder. I then slice a large tomato and place the slices evenly over the fish followed by thin slices of a large onion. I cook it all at about 350 deg for 20 min. I then pull the pan and sprinkle the fish with some motzarella or other prefered grated cheeze. Return it to the oven for enough time to melt the cheeze then serve on a bed of rice.
Mark