Our fish was marvelous!
I thawed a cube of basil/garlic puree, and mixed it with about 4 tbls butter. We put the fish in a sprayed baking dish, and spread half of the butter on top, broiled about 5" from element until one side was golden, then turned the fish, spread the rest on the other side and sprinkled grated parmesan cheese over the top. When the fish was close to being flaky, we removed it from the oven and squeezed some fresh lemon juice over the top.
I also had some fillets that I cooked with the whole fish, as my husband prefers them. The frozen fillets are fine for frying, but they are too thin to broil or grill very successfully, so I stacked them in twos, essentially creating thicker pieces of fish. It worked great!
We get by with a little help from our friends