Oyster Pond Area: Canoa and Big Fish for seafood. Busby's Beach Bar for lunch and is Daniel's by the Sea in the evenings. Those are on the Dutch side.
On the French side Mama's Pizza and BZH Creperie are good and are on the main road. In the marina are Quai Ouest, Captain Oliver's, and Dingy Dock. Captain Oliver's has a seafood buffet on Saturday evenings.
Its only a 15 to 20 minute drive to Gran Case...