I agree with Nutmeg but would include Cafe Roma.
The Beach Bar not only has a great Mahi sandwich but their Rib Eye steak sandwich makes your your mouth water, then the Tuna DOWN!!
On the South side the best Fish&Chips is at the Shipwreck Landing (big tender Chunks of fish fried in a light batter)
And of Course Skinny Legs for Burgers and Mahi sandwiches and well poured cocktails <img src="http://www.traveltalkonline.com/forums/images/graemlins/Cheers.gif" alt="" />
Also the service is better then most islands.