Martello Bar and Grill
(http://itsabitfishy.com/h...) on the beach not far from the ferry wharf, can provide food if you call ahead--268 460 0137 or 268 783 8624.
There are a few modest restaurants in Codrington.
It's a Bit Fishy
On River Road between Codrington and Martello Fort, near gas station
Beach-style restaurant/bar with fresh seafood. Local fish, local owners, everything but the beach.