The menu itself is not really different, but, on occasion, they may have lobster (if it's left from the menu the night before on the ship).
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And, from
http://www.magicalkingdoms.com/cruise/dining/menucookies.html
Lemon and rosemary marinated chicken rotisserie-style
Braised BBQ and honey pork ribs
Flame Grilled Cheeseburger / Hamburger
Cajun spiced, chargrilled Mahi Mahi with a tomato, red onion and lime salsa
New York Hot Dogs with sauerkraut