Randazzo's is good, but check out Bears (there is one just off the end of North Causeway) right near the border of Old Metry and NO.....stellar....we try and go at least once when visiting....they also have one in Covington.
And whoever mentioned Radastas, that place is still the bomb after all these years, got a shrimp poboy from there a few years ago, same as I remember from the 80's.....