mary, frozen is fine, as a matter of fact, preferable...
most cod in the fish mongers case has been previously frozen already and thawed...
I only buy it frozen and vacuum sealed now...

annie, it's good with scallops also... or flounder... or almost any light flaky fish...

This is always a hit for breakfast when the whole family gets together, like at Thanksgiving...
Can be made a day before and just re-heated in the nuke...