The Restaurant at Castle in the Sand Hotel
The restaurant at Castle in the Sand Hotel is endorsed by professional reviewers. Out of 3 professionals tracked on TripExpert, 2 acknowledged the restaurant, including Frommer's and Oyster.
Castle in the Sand Hotel 
Frommer's
Oyster
Frommer's "Around them are all the makings of a good time: restaurant, pool, kids' play areas, beach bar"
Oyster "The Beach House Restaurant serves breakfast a la carte or buffet-style (and there's a kids' menu, of course)"
